<p>In order for humanity to progress and thrive, we must appreciate Earth as the spaceship it is. Our atmosphere, and the diverse ecosystems it sustains, are our vital life support system against an otherwise inhospitable space. Equipped with an astronaut mindset, we treat our natural resources as precious and human kindness as essential.</p>
<p>Arbor is developing a scalable and low-cost approach to reverse humanity&rsquo;s climate footprint, leveraging advanced rocket engine technology and Earth&rsquo;s own natural rhythms. We are designing, manufacturing, and operating systems that will restore balance to the planet and set the foundation for a global circular economy. Our technology converts waste into clean energy and fresh water, while permanently removing CO2 from the atmosphere. We're using the same technology developed to get humans off the Earth to now help us save it.</p>

Organization Type

Organization Size

Funding Stage

Focus: Mitigation or Adaptation

Is this a climate-focused organization?

Sectors

Climate Solutions

industries

remote_preferences

Please provide a link to where you currently list your jobs. If you have a "Careers" page on your website, please list that URL.

Want us to tweet your job? Please write your organization's twitter username below (just the username, please do not add the '@')

Network:

I agree to the terms of use and privacy policy

Transforming waste into clean energy and fresh water while permanently removing CO2 from the atmosphere.

<div><span style="font-size:16px;">Arbor’s team of world-class engineers and scientists are developing a scalable, low-cost approach to Bioenergy with Carbon Capture and Storage (BECCS) based on modern rocket engine technology. BECCS is a carbon dioxide removal (CDR) approach that uses biomass to produce energy and remove CO₂ from the atmosphere and store it permanently underground, while ensuring food security, rural livelihoods, and biodiversity are not affected. Our modular technology leverages the power density of supercritical CO2 to enable compact gasification, oxy-combustion, and high-pressure turbo-expansion to convert abundant waste biomass into clean electricity, water, and high-purity CO2, capturing and sequestering all emissions from the process.  Our team brings together a passion for science, technology, and global stewardship to make low-cost, high-quality carbon removal and baseload power a reality.</span></div><div><br></div><div><span style="font-size:16px;">We are looking for an experience test technician that will be responsible for working with the engineering teams to build test stands, test apparatus, and run test campaigns at Arbor’s test site in San Bernardino. Skills and prior experience in testing, R&amp;D operations, machining, assembly, and electrical will allow for success in this role. </span></div><br><br><h3>Responsibilites</h3><ul><li>Support the manufacturing, assembly, disassembly, troubleshooting for all testing operations at Arbor’s test facility in San Bernardino </li><li>Responsible test setup and teardown, reconfiguration, post-test inspections and teardowns </li><li>Manage all tooling needs (hand tools, power tools, fixturing, etc.) </li><li>Manage all consumables (fittings, fasteners, raw materials, etc.) </li><li>Responsible for ensuring safety procedures are in place, followed, and updated as necessary </li><li>Support installation, commissioning, and operation of testing system in conjunction with test engineer </li><li>Responsible for learning, running, and operating HMI’s during test campaigns </li><li>Work with leadership to ensure the facility meets the needs of the testing, coordinate with contractors on any upgrades (electrical, plumbing, HVAC, industrial gas, etc.) </li><li>As needed, work with leadership on any shipping logistics to/from test sites/venders </li><li>Take on additional responsibilities, within reason, and as necessary to ensure the success of the team</li></ul><h3>Requirements</h3><ul><li> High School diploma or equivalency certificate </li><li>3+ years of experience with aerospace propulsion or turbomachinery development systems </li><li>5+ years of experience working with rapid design, test, and production iterations </li><li>Hands-on experience with test equipment such as valves, regulators, actuators, power supplies, pressure sensors and thermocouples </li><li>Experience with high pressure and high temperature systems </li><li>Experience with teardown of hardware and post-test inspections and documentation </li><li>Ability to read and understand technical drawings, manuals, and reports </li><li>Travel flexibility to Arbor’s HQ located in El Segundo </li></ul><h3>Preferred Qualifications</h3><ul><li>7+ years of experience in hardware development assembly, testing, and manufacturing </li><li>Track record of delivering large and complex projects on time </li><li>Prior experience using precision measuring instruments </li><li>Ability to rapidly change roles/responsibilities while working in a high-paced, challenging work environment </li></ul><br><div><span style="font-size:16px;">Arbor is an equal-opportunity employer.  We never discriminate on the basis of race, religion, national origin, gender identity or expression, sexual orientation, age, or marital, veteran, or disability status. Building a global solution to this global problem will require humans of all varieties to contribute diverse ideas and experiences, so we have put finding and hiring qualified individuals from underrepresented groups at the top of our priority list. </span></div>

Test Technician

<div><span style="font-size:11pt;">We are seeking an Instrumentation Engineer to design, develop, and maintain instrumentation and control systems. Responsibilities include creating wiring and instrumentation drawings, maintaining instrumentation lists, managing instrumentation selection, configuring data and control systems, and supporting instrumentation/controls commissioning and troubleshooting. Ideal candidates have experience with industrial controls such as PLCs and high performance and industrial data acquisition. Experience with low and medium voltage electrical system design and specification is a plus. Systems should be designed and constructed in compliance with industry standards for reliable system performance. This position requires hands-on work in a fast-paced environment with up to 20% travel to our test site in San Bernardino, CA. </span></div><div><br></div><div><span style="font-size:11pt;">Arbor’s team of world-class engineers and scientists are developing a scalable, low-cost approach to Bioenergy with Carbon Capture and Storage (BECCS) based on modern rocket engine technology. BECCS is a carbon dioxide removal (CDR) approach that uses biomass to produce energy and remove CO₂ from the atmosphere and store it permanently underground, while ensuring food security, rural livelihoods, and biodiversity are not affected. Our modular technology leverages the power density of supercritical CO2 to enable compact gasification, oxy-combustion, and high-pressure turbo-expansion to convert abundant waste biomass into clean electricity, water, and high-purity CO2, capturing and sequestering all emissions from the process. Our team brings together a passion for science, technology, and global stewardship to make low-cost, high-quality carbon removal and baseload power a reality. </span></div><div><br></div><br><br><h3>Responsibilities</h3><ul><li>Develop frameworks and internal standards for instrumentation wiring and harness diagrams. </li><li>Work with system engineers to specify appropriate instrumentation. </li><li>Procure and manage instrumentation inventory. </li><li>Collaborate with the systems team to configure data and control systems. </li><li>Assist in P&amp;ID development and Process Hazard Analysis. </li><li>Oversee I/O lists, control panel designs, cable schedules, location plans, and procurement specifications for instrumentation and control equipment. </li><li>Support control system loop checks and troubleshoot field issues during commissioning and startup. </li><li>Develop preventive maintenance and testing procedures to ensure system reliability. </li><li>Select instrumentation for systems requiring SIL3 certification. </li></ul><h3>Requirements</h3><ul><li>Bachelor or Master's degree in Electrical Engineering or STEM field  </li><li>3+ years of Instrumentation Engineering experience  </li><li>Strong knowledge of common instrumentation (thermocouples, RTDs, pressure transducers, valve positioners, etc.). </li><li>Experience in PCB/circuit design for protecting analog instrumentation and DAQ hardware. </li><li>Proven ability to develop wiring diagrams and harnesses for field deployment. </li><li>Familiarity with ISA and IEEE standards, methods, and best practices. </li><li>Experience working with instrumentation used in the process and power generation industries. </li><li>Skilled in troubleshooting and resolving instrumentation issues in the field.  </li></ul><h3>Preferred Qualifications </h3><ul><li>Proficiency in Python, C++, or Golang development. </li><li>Knowledge of NEC &amp; IEC standards and best practices. </li><li>Experience working with UEIDAQ data acquisition equipment. </li><li>Familiarity with PLCs/PACs, specifically Opto22. </li><li>Previous experience in a startup environment. </li><li>Expertise in low and medium voltage power system design, including: </li><li>Electrical/I&amp;C design documents (single-line diagrams, panel schedules, wiring diagrams, raceway drawings, etc.). </li><li>Vendor protective relay equipment (SEL, ABB, GE, Areva, Basler). </li><li>Specification of electrical equipment (transformers, switchgear, MCCs, UPS/DC). </li></ul><br><div><b style="font-size:11pt;">Benefits:</b><span style="font-size:11pt;"> </span></div><div><span style="font-size:14.6667px;">Equity: The business opportunity for carbon removal technology is growing rapidly, and we</span></div><div><span style="font-size:11pt;">want our team to share in Arbor's successes, so we offer stock options to all employees.  </span></div><div><span style="font-size:11pt;">Extensive medical benefits, including Health, Dental, and Vision, and Life Insurance </span></div><div><span style="font-size:11pt;">Company FSA and HSA contributions </span></div><div><span style="font-size:11pt;">Unlimited PTO  </span></div><div><span style="font-size:11pt;">12+ company holidays, including Earth Day!  </span></div>

Instrumentation Engineer

<div><span style="font-size:16px;">Arbor’s team of world-class engineers and scientists are developing a scalable, low-cost approach to Bioenergy with Carbon Capture and Storage (BECCS) based on modern rocket engine technology. BECCS is a carbon dioxide removal (CDR) approach that uses biomass to produce energy and remove CO₂ from the atmosphere and store it permanently underground, while ensuring food security, rural livelihoods, and biodiversity are not affected. Our modular technology leverages the power density of supercritical CO2 to enable compact gasification, oxy-combustion, and high-pressure turbo-expansion to convert abundant waste biomass into clean electricity, water, and high-purity CO2, capturing and sequestering all emissions from the process.  Our team brings together a passion for science, technology, and global stewardship to make low-cost, high-quality carbon removal and baseload power a reality.</span></div><div><br></div><div><span style="font-size:16px;">We’re looking for a Combustion Engineer to take ownership of the development, testing, and optimization of our biomass gasification reactor as we scale from demonstration to pilot and beyond. As a core member of a small, hands-on combustion team, you’ll guide daily operations, execute performance testing, and lead design improvements to ensure safe, reliable, and high-performing systems.</span></div><br><br><h3>Responsibilities</h3><ul><li>Serve as technical lead for the biomass gasification reactor, owning design, build, operation, and iteration.</li><li>Conduct and lead test campaigns, including planning, execution, and data analysis.</li><li>Operate and troubleshoot the gasification reactor during daily testing and development.</li><li>Guide system configuration and performance optimization efforts.</li><li>Own and execute feedstock sensitivity studies to assess system flexibility and robustness.</li><li>Drive continuous improvement through design changes and upgrades.</li><li>Collaborate cross-functionally to support system integration and scale-up.</li><li>Ensure safe operation of high-temperature, high-pressure thermochemical equipment.</li></ul><h3>Requirements</h3><ul><li>Bachelor’s degree in Mechanical, Aerospace, Chemical Engineering, or related field.</li><li>5+ years of experience in combustion system design, analysis, and testing.</li><li>Strong understanding of thermodynamics, fluid mechanics, and heat transfer.</li><li>Hands-on experience with high-temperature and pressure equipment.</li><li>Demonstrated ability to own product lifecycle from conceptual design to validation.</li><li>Willing to travel (up to 20%) to the test site in San Bernardino, CA, for operational activities and builds.</li></ul><h3>Preferred Qualifications</h3><ul><li>Advanced degree (M.S. or Ph.D.) with a focus on combustion science or energy systems.</li><li>Experience with supercritical CO₂ or high-pressure combustion systems.</li><li>Familiarity with low-emissions combustion strategies, such as lean premixed combustion or staged combustion.</li><li>Knowledge of chemical kinetics and fuel property effects on combustion behavior.</li><li>Proficiency in combustion modeling tools (e.g., CHEMKIN, Cantera, Fluent, or OpenFOAM).</li><li>Programming or scripting skills for data reduction and automation (Python, MATLAB, etc.).</li><li>Experience working in startup or experimental R&amp;D environments.</li></ul><br><div><span style="font-size:16px;">Arbor is an equal-opportunity employer.  We never discriminate on the basis of race, religion, national origin, gender identity or expression, sexual orientation, age, or marital, veteran, or disability status. Building a global solution to this global problem will require humans of all varieties to contribute diverse ideas and experiences, so we have put finding and hiring qualified individuals from underrepresented groups at the top of our priority list. </span></div>

Combustion Engineer

<div><span style="font-size:11pt;">We are seeking a Senior Instrumentation Engineer to design, develop, and maintain instrumentation and control systems. Responsibilities include creating wiring and instrumentation drawings, maintaining instrumentation lists, managing instrumentation selection, configuring data and control systems, and supporting instrumentation/controls commissioning and troubleshooting. Ideal candidates have experience with industrial controls such as PLCs and high performance and industrial data acquisition. Experience with low and medium voltage electrical system design and specification is a plus. Systems should be designed and constructed in compliance with industry standards for reliable system performance. This position requires hands-on work in a fast-paced environment with up to 20% travel to our test site in San Bernardino, CA. </span></div><div><br></div><div><span style="font-size:11pt;">Arbor’s team of world-class engineers and scientists are developing a scalable, low-cost approach to Bioenergy with Carbon Capture and Storage (BECCS) based on modern rocket engine technology. BECCS is a carbon dioxide removal (CDR) approach that uses biomass to produce energy and remove CO₂ from the atmosphere and store it permanently underground, while ensuring food security, rural livelihoods, and biodiversity are not affected. Our modular technology leverages the power density of supercritical CO2 to enable compact gasification, oxy-combustion, and high-pressure turbo-expansion to convert abundant waste biomass into clean electricity, water, and high-purity CO2, capturing and sequestering all emissions from the process. Our team brings together a passion for science, technology, and global stewardship to make low-cost, high-quality carbon removal and baseload power a reality. </span></div><div><br></div><br><br><h3>Responsibilities</h3><ul><li>Develop frameworks and internal standards for instrumentation wiring and harness diagrams. </li><li>Work with system engineers to specifyappropriate instrumentation. </li><li>Procure and manage instrumentation inventory. </li><li>Collaborate with the systems team to configure data and control systems. </li><li>Assist in P&amp;ID development and Process Hazard Analysis. </li><li>Oversee I/O lists, control panel designs, cable schedules, location plans, and procurement specifications for instrumentation and control equipment. </li><li>Support control system loop checks and troubleshoot field issues during commissioning and startup. </li><li>Develop preventive maintenance and testing procedures to ensure system reliability. </li><li>Select instrumentation for systems requiring SIL3 certification. </li></ul><h3>Requirements</h3><ul><li>Bachelor or Master's degree in Electrical Engineering or STEM field  </li><li>5+ years of Instrumentation Engineering experience  </li><li>Strong knowledge of common instrumentation (thermocouples, RTDs, pressure transducers, valve positioners, etc.). </li><li>Experience in PCB/circuit design for protecting analog instrumentation and DAQ hardware. </li><li>Proven ability to develop wiring diagrams and harnesses for field deployment. </li><li>Familiarity with ISA and IEEE standards, methods, and best practices. </li><li>Experience working with instrumentation used in the process and power generation industries. </li><li>Skilled in troubleshooting and resolving instrumentation issues in the field.  </li></ul><h3>Preferred Qualifications </h3><ul><li>Proficiency in Python, C++, or Golang development. </li><li>Knowledge of NEC &amp; IEC standards and best practices. </li><li>Experience working with UEIDAQ data acquisition equipment. </li><li>Familiarity with PLCs/PACs, specifically Opto22. </li><li>Previous experience in a startup environment. </li><li>Expertise in low and medium voltage power system design, including: </li><li>Electrical/I&amp;C design documents (single-line diagrams, panel schedules, wiring diagrams, raceway drawings, etc.). </li><li>Vendor protective relay equipment (SEL, ABB, GE, Areva, Basler). </li><li>Specification of electrical equipment (transformers, switchgear, MCCs, UPS/DC). </li></ul><br><div><b style="font-size:11pt;">Benefits:</b><span style="font-size:11pt;"> </span></div><div><span style="font-size:14.6667px;">Equity: The business opportunity for carbon removal technology is growing rapidly, and we</span></div><div><span style="font-size:11pt;">want our team to share in Arbor's successes, so we offer stock options to all employees.  </span></div><div><span style="font-size:11pt;">Extensive medical benefits, including Health, Dental, and Vision, and Life Insurance </span></div><div><span style="font-size:11pt;">Company FSA and HSA contributions </span></div><div><span style="font-size:11pt;">Unlimited PTO  </span></div><div><span style="font-size:11pt;">12+ company holidays, including Earth Day!  </span></div>

Senior Instrumentation Engineer

<div><span style="font-size:11pt;">We are seeking a Mechanical Design Engineer to design, develop, and oversee mechanical and electro-mechanical systems. In this role, you will use FEM software, CAD tools, and hand calculations to create and refine designs, generate technical drawings, and lead skilled technicians in building and testing systems. The ideal candidate has experience with hazardous systems, control systems, and industry standards like ASME and AISC.  </span></div><div><br></div><div><span style="font-size:11pt;">Arbor’s team of world-class engineers and scientists are developing a scalable, low-cost approach to Bioenergy with Carbon Capture and Storage (BECCS) based on modern rocket engine technology. BECCS is a carbon dioxide removal (CDR) approach that uses biomass to produce energy and remove CO₂ from the atmosphere and store it permanently underground, while ensuring food security, rural livelihoods, and biodiversity are not affected. Our modular technology leverages the power density of supercritical CO2 to enable compact gasification, oxy-combustion, and high-pressure turbo-expansion to convert abundant waste biomass into clean electricity, water, and high-purity CO2, capturing and sequestering all emissions from the process. Our team brings together a passion for science, technology, and global stewardship to make low-cost, high-quality carbon removal and baseload power a reality. </span></div><br><br><h3>Responsibilities </h3><ul><li>Own the development of multiple mechanical and electro-mechanical systems  </li><li>Use FEM software and hand calculations to design and build mechanical systems for energy generation.  </li><li>Create drawings and work instructions for system design and construction.  </li><li>Collaborate with and guide technicians in building and testing mechanical systems.  </li><li>Improve and refine the mechanical systems under your responsibility. </li></ul><h3>Requirements </h3><ul><li>Bachelor’s degree in Mechanical or Aerospace Engineering.  </li><li>3+ years of experience as a mechanical engineer.  </li><li>Proficiency in CAD and FEA software. </li><li>Must work on-site at headquarters in El Segundo, CA.  </li><li>Willing to travel (up to 20%) to the test site in San Bernardino, CA for operational activities and builds. </li></ul><h3>Preferred Qualifications </h3><ul><li>Experience working with hazardous systems (high pressure, high energy, hazardous gases/fluids).  </li><li>Familiarity with SOLIDWORKS, Siemens NX, or similar CAD software.  </li><li>Experience using ANSYS or similar finite element analysis tools.  </li><li>Knowledge of control systems for remote operations and instrumentation feedback.  </li><li>Familiarity with engineering standards such as ASME B31.3, ASME BPV Code Section VIII, and AISC 360. </li><li>Experience with root cause analysis.  </li><li>Ability to prioritize and perform well under pressure.  </li><li>Strong communication and presentation skills. </li></ul><br><div><b style="font-size:11pt;">Benefits:</b><span style="font-size:11pt;"> </span></div><div><span style="font-size:11pt;">Equity: The business opportunity for carbon removal technology is growing rapidly, and we want our team to share in Arbor's successes, so we offer stock options to all employees.  </span></div><div><span style="font-size:11pt;">Extensive medical benefits, including Health, Dental, and Vision, and Life Insurance </span></div><div><span style="font-size:11pt;">Company FSA and HSA contributions </span></div><div><span style="font-size:11pt;">Unlimited PTO  </span></div><div><span style="font-size:11pt;">12+ company holidays, including Earth Day!  </span></div><div><span style="font-size:11pt;"> </span></div><div><span style="font-size:11pt;"> Arbor is an equal opportunity employer. We never discriminate on the basis of race, religion, national origin, gender identity or expression, sexual orientation, age, or marital, veteran, or disability status. Building a global solution to this global problem will require humans of all varieties to contribute diverse ideas and experiences, so we have put finding and hiring qualified individuals from underrepresented groups at the top of our priority list.  </span></div>

Mechanical Design Engineer

<div><span style="font-size:11pt;">We are seeking a Fluids System Build Engineer to design, procure, and oversee construction of fluid systems for testing advanced equipment. This role involves specifying components, assembling and integrating fluid systems, and ensuring reliable operation under test conditions. The ideal candidate has experience with high-pressure systems, fluid dynamics, and working with hazardous gases and liquids. This position requires hands-on work in a fast-paced environment with up to 40% travel to our test site in San Bernardino, CA. </span></div><div><br></div><div><span style="font-size:11pt;">Arbor’s team of world-class engineers and scientists are developing a scalable, low-cost approach to Bioenergy with Carbon Capture and Storage (BECCS) based on modern rocket engine technology. BECCS is a carbon dioxide removal (CDR) approach that uses biomass to produce energy and remove CO₂ from the atmosphere and store it permanently underground, while ensuring food security, rural livelihoods, and biodiversity are not affected. Our modular technology leverages the power density of supercritical CO2 to enable compact gasification, oxy-combustion, and high-pressure turbo-expansion to convert abundant waste biomass into clean electricity, water, and high-purity CO2, capturing and sequestering all emissions from the process. Our team brings together a passion for science, technology, and global stewardship to make low-cost, high-quality carbon removal and baseload power a reality. </span></div><br><br><h3>Responsibilities: </h3><ul><li>Design and specify fluid system components, including pumps, valves, regulators, and piping. </li><li>Procure and manage inventory of fluid system components and materials. </li><li>Manage modifications, new construction, and commissioning of fluid systems to support equipment testing. </li><li>Ensure compliance with industry standards and safety regulations. </li><li>Work closely with test engineers to optimize fluid system design requirements performance. </li><li>Troubleshoot and resolve issues related to fluid system operation. </li><li>Develop documentation, including schematics, equipment data sheets, procedures, and maintenance plans. </li><li>Support commissioning and field operations at test sites as needed. </li></ul><h3>Requirements: </h3><ul><li>Bachelor’s degree in Mechanical, Chemical, or a related engineering field. </li><li>3+ years of experience designing and building fluid or piping systems. </li><li>Knowledge of pumps, valves, regulators, and pressure vessels. </li><li>Experience with high-pressure and hazardous fluid systems. </li><li>Strong hands-on fabrication and assembly skills. </li><li>Ability to read and create P&amp;IDs and system schematics. </li></ul><h3>Preferred Qualifications: </h3><ul><li>Experience with API, ASME, ANSI, and NFPA fluid system standards. </li><li>Familiarity with cryogenic, high-pressure gas, and high-performance liquid systems. </li><li>Knowledge of welding, tubing, and pipefitting techniques. </li><li>Experience in commissioning activities such as leak testing, pressure testing, and instrumentation validation. </li><li>Proficiency in CAD tools (such as Siemens NX) for 3D design of piping and equipment layout. </li><li>Comfortable working in a startup or R&amp;D environment. </li><li>Strong problem-solving and troubleshooting skills. </li></ul><br><div><b style="font-size:11pt;">Benefits:</b><span style="font-size:11pt;"> </span></div><div><span style="font-size:11pt;">Equity: The business opportunity for carbon removal technology is growing rapidly, and we want our team to share in Arbor's successes, so we offer stock options to all employees.  </span></div><div><span style="font-size:11pt;">Extensive medical benefits, including Health, Dental, and Vision, and Life Insurance </span></div><div><span style="font-size:11pt;">Company FSA and HSA contributions </span></div><div><span style="font-size:11pt;">Unlimited PTO  </span></div><div><span style="font-size:11pt;">12+ company holidays, including Earth Day!  </span></div><div><span style="font-size:11pt;"> </span></div><div><span style="font-size:11pt;">Arbor is an equal opportunity employer. We never discriminate on the basis of race, religion, national origin, gender identity or expression, sexual orientation, age, or marital, veteran, or disability status. Building a global solution to this global problem will require humans of all varieties to contribute diverse ideas and experiences, so we have put finding and hiring qualified individuals from underrepresented groups at the top of our priority list. </span></div>

Fluids System Build Engineer

<div><span style="font-size:16px;">Arbor’s team of world-class engineers and scientists are developing a scalable, low-cost approach to Bioenergy with Carbon Capture and Storage (BECCS) based on modern rocket engine technology. BECCS is a carbon dioxide removal (CDR) approach that uses biomass to produce energy and remove CO₂ from the atmosphere and store it permanently underground, while ensuring food security, rural livelihoods, and biodiversity are not affected. Our modular technology leverages the power density of supercritical CO2 to enable compact gasification, oxy-combustion, and high-pressure turbo-expansion to convert abundant waste biomass into clean electricity, water, and high-purity CO2, capturing and sequestering all emissions from the process.  Our team brings together a passion for science, technology, and global stewardship to make low-cost, high-quality carbon removal and baseload power a reality.</span></div><div><br></div><div><span style="font-size:16px;">We are seeking a Test Engineer to develop, execute, and oversee testing procedures and test stand hardware to test complex fluid, mechanical and electrical systems. This role involves designing test plans, analyzing performance data, building and troubleshooting test stand fluids and instrumentation systems, and ensuring compliance with safety and quality standards. The ideal candidate has experience in test automation, data acquisition, and working with high-energy or hazardous systems. This position requires on-site work with up to 40% travel to local test facilities.</span></div><br><br><h3>Responsibilities</h3><ul><li>Collaborate with design engineers to develop and implement test plans for fluid, electrical, and control systems.</li><li>Oversee test execution, analyze data, and troubleshoot system performance issues.</li><li>Design and maintain test fluid systems, fixtures, and instrumentation.</li><li>Ensure compliance with safety regulations and industry standards.</li><li>Develop and maintain procedures for test site operation and management.</li></ul><h3>Requirements</h3><ul><li>Bachelor’s degree in Mechanical, Electrical, Aerospace, or a related engineering field.</li><li>3+ years of experience in system testing, validation, or a related field.</li><li>Experience with high-pressure gas systems.</li><li>Strong troubleshooting and problem-solving skills.</li><li>Familiarity with test instrumentation and sensor integration.</li><li>Proficiency in analyzing test data and generating reports.</li></ul><h3>Preferred Qualifications</h3><ul><li>Experience testing high-energy or hazardous systems (high voltage, high pressure, etc.).</li><li>Experience with data acquisition and test automation systems.</li><li>Knowledge of LabVIEW, Python, MATLAB, or similar for test automation.</li><li>Experience working with PLCs, control systems, and industrial sensors.</li><li>Familiarity with industry standards such as API, ASME, IEEE, or MIL-STD.</li><li>Experience in a fast-paced startup or R&amp;D environment.</li></ul><br><div><span style="font-size:16px;">Arbor is an equal-opportunity employer.  We never discriminate on the basis of race, religion, national origin, gender identity or expression, sexual orientation, age, or marital, veteran, or disability status. Building a global solution to this global problem will require humans of all varieties to contribute diverse ideas and experiences, so we have put finding and hiring qualified individuals from underrepresented groups at the top of our priority list. </span></div>

Test Engineer (High-Pressure Gas Systems)

<div><span style="font-size:16px;">Arbor’s team of world-class engineers and scientists are developing a scalable, low-cost approach to Bioenergy with Carbon Capture and Storage (BECCS) based on modern rocket engine technology. BECCS is a carbon dioxide removal (CDR) approach that uses biomass to produce energy and remove CO₂ from the atmosphere and store it permanently underground, while ensuring food security, rural livelihoods, and biodiversity are not affected. Our modular technology leverages the power density of supercritical CO2 to enable compact gasification, oxy-combustion, and high-pressure turbo-expansion to convert abundant waste biomass into clean electricity, water, and high-purity CO2, capturing and sequestering all emissions from the process.  Our team brings together a passion for science, technology, and global stewardship to make low-cost, high-quality carbon removal and baseload power a reality.</span></div><div><br></div><div><span style="font-size:16px;">We are seeking a Lead Test Engineer to develop, execute, and oversee testing procedures and test stand hardware to test complex fluid, mechanical and electrical systems. This role involves designing test plans, analyzing performance data, building and troubleshooting test stand fluids and instrumentation systems, and ensuring compliance with safety and quality standards. The ideal candidate has experience in test automation, data acquisition, and working with high-energy or hazardous systems. This position requires on-site work with up to 40% travel to our test site in San Bernardino, CA.</span></div><br><br><h3>Responsibilities</h3><ul><li>Collaborate with design engineers to develop and implement test plans for fluid, electrical, and control systems.</li><li>Oversee test execution, analyze data, and troubleshoot system performance issues.</li><li>Design and maintain test fluid systems, fixtures, and instrumentation.</li><li>Ensure compliance with safety regulations and industry standards.</li><li>Develop and maintain procedures for test site operation and management.</li><li>Lead a team of test engineers and technicians in executing test campaigns.</li></ul><h3>Requirements</h3><ul><li>Bachelor’s degree in Mechanical, Electrical, Aerospace, or a related engineering field.</li><li>5+ years of experience in system testing, validation, or a related field.</li><li>Experience leading a team.</li><li>Experience with high-pressure gas systems.</li><li>Strong troubleshooting and problem-solving skills.</li><li>Familiarity with test instrumentation and sensor integration.</li><li>Proficiency in analyzing test data and generating reports.</li></ul><h3>Preferred Qualifications</h3><ul><li>Experience testing high-energy or hazardous systems (high voltage, high pressure, etc.).</li><li>Experience with data acquisition and test automation systems.</li><li>Knowledge of LabVIEW, Python, MATLAB, or similar for test automation.</li><li>Experience working with PLCs, control systems, and industrial sensors.</li><li>Familiarity with industry standards such as API, ASME, IEEE, or MIL-STD.</li><li>Experience in a fast-paced startup or R&amp;D environment.</li><li>Strong leadership and project management skills.</li></ul><br><div><span style="font-size:16px;">Arbor is an equal-opportunity employer.  We never discriminate on the basis of race, religion, national origin, gender identity or expression, sexual orientation, age, or marital, veteran, or disability status. Building a global solution to this global problem will require humans of all varieties to contribute diverse ideas and experiences, so we have put finding and hiring qualified individuals from underrepresented groups at the top of our priority list. </span></div>

Lead Test Engineer (High-Pressure Gas Systems)

<div><span style="font-size:16px;">Arbor’s team of world-class engineers and scientists are developing a scalable, low-cost approach to Bioenergy with Carbon Capture and Storage (BECCS) based on modern rocket engine technology. BECCS is a carbon dioxide removal (CDR) approach that uses biomass to produce energy and remove CO₂ from the atmosphere and store it permanently underground, while ensuring food security, rural livelihoods, and biodiversity are not affected. Our modular technology leverages the power density of supercritical CO2 to enable compact gasification, oxy-combustion, and high-pressure turbo-expansion to convert abundant waste biomass into clean electricity, water, and high-purity CO2, capturing and sequestering all emissions from the process.  Our team brings together a passion for science, technology, and global stewardship to make low-cost, high-quality carbon removal and baseload power a reality.</span></div><div><br></div><div><span style="font-size:16px;">We’re looking for a Gasification Engineer to take ownership of the development, testing, and optimization of our biomass gasification reactor as we scale from demonstration to pilot and beyond. As a core member of a small, hands-on combustion team, you’ll guide daily operations, execute performance testing, and lead design improvements to ensure safe, reliable, and high-performing systems.</span></div><br><br><h3>Responsibilities</h3><ul><li>Serve as technical lead for the biomass gasification reactor, owning design, build, operation, and iteration.</li><li>Conduct and lead test campaigns, including planning, execution, and data analysis.</li><li>Operate and troubleshoot the gasification reactor during daily testing and development.</li><li>Guide system configuration and performance optimization efforts.</li><li>Own and execute feedstock sensitivity studies to assess system flexibility and robustness.</li><li>Drive continuous improvement through design changes and upgrades.</li><li>Collaborate cross-functionally to support system integration and scale-up.</li><li>Ensure safe operation of high-temperature, high-pressure thermochemical equipment.</li></ul><h3>Requirements</h3><ul><li>Bachelor’s degree in<b> Mechanical, Aerospace, Chemical Engineering, </b>or related field.</li><li>5+ years of experience in <b>combustion system design, analysis, and testing</b>.</li><li>Strong understanding of <b>thermodynamics, fluid mechanics, and heat transfer</b>.</li><li>Hands-on experience with high-temperature and pressure equipment.</li><li>Demonstrated ability to own product lifecycle from conceptual design to validation.</li><li>Willing to travel (up to 20%) to the test site in San Bernardino, CA, for operational activities and builds.</li></ul><h3>Preferred Qualifications</h3><ul><li>Advanced degree (M.S. or Ph.D.) with a focus on combustion science or energy systems.</li><li>Experience with supercritical CO₂ or high-pressure combustion systems.</li><li>Familiarity with low-emissions combustion strategies, such as lean premixed combustion or staged combustion.</li><li>Knowledge of chemical kinetics and fuel property effects on combustion behavior.</li><li>Proficiency in <b>combustion modeling tools</b> (e.g., CHEMKIN, Cantera, Fluent, or OpenFOAM).</li><li>Programming or scripting skills for data reduction and automation (Python, MATLAB, etc.).</li><li>Experience working in startup or experimental R&amp;D environments.</li></ul><br><div><span style="font-size:16px;">Arbor is an equal-opportunity employer.  We never discriminate on the basis of race, religion, national origin, gender identity or expression, sexual orientation, age, or marital, veteran, or disability status. Building a global solution to this global problem will require humans of all varieties to contribute diverse ideas and experiences, so we have put finding and hiring qualified individuals from underrepresented groups at the top of our priority list. </span></div>

Gasification Engineer

<div><span style="font-size:16px;">Arbor’s team of world-class engineers and scientists are developing a scalable, low-cost approach to Bioenergy with Carbon Capture and Storage (BECCS) based on modern rocket engine technology. BECCS is a carbon dioxide removal (CDR) approach that uses biomass to produce energy and remove CO₂ from the atmosphere and store it permanently underground, while ensuring food security, rural livelihoods, and biodiversity are not affected. Our modular technology leverages the power density of supercritical CO2 to enable compact gasification, oxy-combustion, and high-pressure turbo-expansion to convert abundant waste biomass into clean electricity, water, and high-purity CO2, capturing and sequestering all emissions from the process.  Our team brings together a passion for science, technology, and global stewardship to make low-cost, high-quality carbon removal and baseload power a reality.</span></div><div><br></div><div><span style="font-size:16px;">We're looking for a Combustion Analysis Engineer to perform fluid, thermal, and structural analyses on our novel combustion systems—bringing high-performance engineering to the fight against climate change. You'll work closely with combustion engineers and designers to inform and accelerate development using advanced simulation tools, algorithmic workflows, and additive manufacturing. Your work will help bridge modeling and reality through system integration and hot-fire test validation.</span></div><br><br><h3>Responsibilities</h3><ul><li>Perform CFD, transient thermal, and structural analyses on combustion hardware.</li><li>Collaborate with combustion and mechanical engineers to develop practical, testable designs.</li><li>Use integrated system models to inform design direction and support performance prediction.</li><li>Help anchor simulation results with hot-fire test data and iterate models accordingly.</li><li>Contribute to a fast-paced, collaborative team with a focus on climate-impactful technology.</li></ul><h3>Requirements</h3><ul><li>Bachelor’s degree in Mechanical, Aerospace, or related Engineering field.</li><li>3+ years of experience in fluid dynamics, CFD, and transient thermal analysis.</li><li>Strong foundation in compressible and incompressible fluid mechanics.</li><li>Experience with CFD tools like StarCCM+, ANSYS CFX, or FLUENT.</li><li>Proficient in Python, MATLAB, or similar scripting tools for automation and post-processing.</li><li>Strong ownership mentality and eagerness to work collaboratively in a small, dynamic team.</li></ul><h3>Preferred Qualifications</h3><ul><li>5+ years of experience in propulsion or combustion analysis.</li><li>Master’s or Ph.D. in Mechanical, Aerospace, or Electrical Engineering.</li><li>Experience working in startup or agile development environments.</li><li>Familiarity with conjugate heat transfer simulations.</li><li>Interest in or ability to lead and grow a small analysis team over time.</li></ul><br><div><span style="font-size:16px;">Arbor is an equal-opportunity employer.  We never discriminate on the basis of race, religion, national origin, gender identity or expression, sexual orientation, age, or marital, veteran, or disability status. Building a global solution to this global problem will require humans of all varieties to contribute diverse ideas and experiences, so we have put finding and hiring qualified individuals from underrepresented groups at the top of our priority list. </span></div>

Explore jobs

Get Hired

Discover climate organizations

Join our Fellowship

Post a job

Speak at our Fellowship

Become a Climatebase member

Arbor Energy

Sectors

Company Description

Jobs (10)

Email me jobs from Arbor Energy

Sectors

Drawdown Solutions

Email me jobs from Arbor Energy

PLATFORMS

MEMBERS

WHO WE ARE