Sr. Process Engineer

We are seeking a Senior Process Engineer to develop and own process engineering deliverables for modular process units such as biomass gasification, oxy-combustion, supercritical CO2 power generation, CO2 purification and liquefaction, and wastewater treatment. As a process engineer at a fast-paced company developing novel technology, you’ll participate in a wide range of activities from conceptual studies through plant commissioning, startup, and troubleshooting. As projects move into the detailed engineering and construction phases, you will be responsible for managing EPC process engineering efforts to ensure successful project execution.

This Senior role also involves the establishment of internal documentation, standards, and work processes. The ideal candidate has experience across the project lifecycle from conceptual design through detailed design, commissioning, and operation. Hands-on experience with construction or field troubleshooting is also highly valued.

Arbor’s team of world-class engineers and scientists is 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.

• Design Basis
• Process Flow Diagrams (PFDs)
• Heat and Material Balances (HMBs)
• Piping and Instrumentation Diagrams (P&IDs)
• Line sizing and line lists
• Equipment sizing and specification of pressure vessels, heat exchangers, pumps, control valves, etc.
• Instrument specifications for common instrumentation like temperature, pressure, flow, and level
• Pressure relief load calculations and relief valve sizing
• Process hazard analysis (PHA) and HAZOPs
• Conceptual and feasibility studies and supporting cost estimates
• Control narrative development
• Review of detailed piping and equipment design with multidisciplinary in-house experts
• Development of operating procedures
• Alarms review

• Bachelor’s degree in chemical or mechanical engineering
• 8+ years of process engineering experience
• Excellent understanding of chemical engineering principles and broad understanding of downstream discipline requirements (mechanical, civil, electrical, etc.)
• Demonstrated ability to coordinate multidisciplinary engineering teams and deliver successful projects

• Experience in a startup or agile development environment
• Hands-on field troubleshooting and/or operations experience
• Experience in power generation, gasification, supercritical CO2, or other high pressure (100+ bar) system design
• Professional Engineer (PE) license

• Stock options
• Medical, dental, and vision insurance (Arbor covers 90% for employees)
• Basic life insurance fully covered
• Health savings account (HSA) with matching
• Flexible savings account (FSA)
• Unlimited PTO  
• 12+ company holidays, including Earth Day!  
• 401(k)
• Commuter benefits
• Annual learning and development stipend
• And more!

Arbor is proud to be an equal opportunity employer. We evaluate qualified applicants without regard to race, religion, national origin, gender identity or expression, sexual orientation, age, marital or veteran status, disability, or any other protected characteristic under applicable law. Solving global energy challenges requires a wide range of perspectives and experiences, and we are committed to building a team that reflects the world we serve.