Sr. Heat Exchanger Engineer

About the role

At Arbor Energy & Resources Corporation ("Arbor Energy"), we're creating technology to power our lives while protecting the planet that sustains them. Our advanced power systems deliver clean, reliable baseload electricity with zero operating emissions-modular, fuel-flexible, and engineered for the realities of today's energy demand. At the core is a supercritical CO₂ turbine with integrated carbon capture, designed to bring carbon-neutral power online quickly at meaningful scale. Our team includes aerospace engineers, combustion experts, and systems thinkers with a shared goal: to build technology worthy of the world we want to live in. While many of us began our journeys looking to the stars, we're applying that expertise here at home to deliver dependable, emission-free baseload power and a future of lasting abundance. If you share our values and are drawn to rigorous work with lasting impact, we'd love to learn more about you. Come build what the future will run on. Steward our planet : We build for tomorrow, ensuring every bolt we tighten and every hand we lend leaves our environment stronger than we found it. Lead with Love : We champion the success of our people, partners, and planet, nurturing excellence through camaraderie and rigor. Explore the Uncharted : We embrace the unknown with curiosity, using courage and discipline to transform uncertainty into opportunity. Role Overview We're looking for a Sr. Heat Exchanger Engineer to own the design, specification, and development of heat exchangers across Arbor's supercritical CO₂ power system. You'll span the full range-from specifying and technically managing third-party shell-and-tube coolers and air coolers, to leading in-house detailed design of advanced compact heat exchangers in high-temperature nickel superalloys. You'll work closely with thermodynamic cycle analysts, mechanical systems engineers, and test engineers in a fast-paced, hands-on R&D environment. This is a rare opportunity to apply deep thermal-fluids and manufacturing expertise to climate-impactful technology at the frontier of power generation.

Responsibilities

• Own the thermal-hydraulic design of all heat exchangers in the Arbor power system-recuperators, precoolers, primary heat exchangers, and water and air coolers-from conceptual sizing through detailed design, balancing performance, pressure drop, and cost.
• Specify, procure, and technically manage third-party heat exchangers-including shell-and-tube coolers, fin-fan air coolers, and advanced compact units-from thermal datasheet through vendor drawing review and factory acceptance testing.
• Collaborate with a dedicated pressure vessel engineer on mechanical design under ASME, TEMA, and API 661; maintain working familiarity with applicable codes to make sound design decisions and effectively review deliverables.
• Plan and execute thermal and hydraulic performance testing during development campaigns: define instrumentation requirements, write test procedures, lead data reduction, and anchor analytical models to test data.
• Collaborate closely with thermodynamic cycle analysts, mechanical systems engineers, and test engineers to translate cycle-level requirements into hardware specifications and integrate heat exchangers into the broader power system.
• Champion design for manufacturability and scalability across in-house heat exchanger development programs, bridging detailed design and production to bring novel hardware from concept to reality.
• Generate and maintain the full engineering documentation package: thermal and mechanical calculation packages, drawings, material and process specifications, and test reports.

Requirements

• Bachelor's degree in Mechanical, Chemical, Aerospace, or related Engineering field.
• 10+ years of experience in heat exchanger design and development, spanning thermal-hydraulic analysis, mechanical design, and hardware validation.
• Demonstrated experience designing advanced compact heat exchangers-PCHEs, plate-fin, microchannel, or similar-including selection and optimization of channel geometry for performance, pressure drop, and manufacturability.
• Experience specifying and technically managing conventional heat exchangers (shell-and-tube, air-cooled) per TEMA and API 661 standards.
• Working familiarity with ASME Boiler and Pressure Vessel Code and its application to heat exchanger mechanical design.
• Proficiency in industry thermal design tools (HTRI or equivalent) and scripting or computation for custom analyses (Python, MATLAB, or similar).
• Proven track record of taking heat exchanger hardware from design thr

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