Staff Heat Exchanger Design Engineer

Karman Industries•Los Angeles, CA

6d•$155,000 - $225,000•Onsite

About The Position

Karman Industries is seeking an engineer to lead the design, development, and qualification of the heat exchangers in our CO₂ heating and cooling systems. The scope includes compact, high-pressure CO₂ exchangers such as printed circuit heat exchangers (PCHEs), along with the gas coolers and heat rejection equipment around them. The role also covers electronics cooling, including cold plate design. The role starts with our pilot CO₂ heat exchanger and PCHE prototype program and carries that work through to production-ready designs. Karman is seeking both a hands-on technical leadership and individual contributor role. Successful candidates will do the engineering directly, set technical direction for the heat exchanger program, and build a small team as the company scales. Close collaboration with manufacturing is central to the role, as the designs must move from prototype to high-volume production.

Requirements

10+ years of heat exchanger design experience, with a demonstrated record of taking designs from concept to fielded product.
Strong command of thermodynamics, heat transfer, and two-phase and supercritical fluid flow.
Direct experience with compact heat exchangers (PCHE, microchannel, plate-fin, or brazed construction).
Working knowledge of high-pressure design codes and pressure equipment compliance.
Experience working directly with manufacturing to transition designs from prototype to volume production.
Experience in a fast-growing or scale-up environment with broad individual ownership and limited established process.
Demonstrated technical leadership: setting direction, making sound decisions with incomplete information, and building alignment across teams.
Ability to work onsite in the Los Angeles area.

Nice To Haves

Background in HVAC&R, data center cooling, power generation, cryogenics, or aerospace thermal systems.
Experience with CO₂ (R744) systems, transcritical cycles, or supercritical CO₂ equipment.
Experience with electronics thermal management, including liquid cold plates for high-power processors or power electronics.
Experience qualifying new suppliers and manufacturing processes.
Advanced degree (M.S. or Ph.D.) in mechanical, thermal, or chemical engineering.
Experience developing engineering analysis tools, including CFD, FEA, and Python-based modeling.

Responsibilities

Own the thermal and hydraulic design of CO₂ heat exchangers across the full operating envelope, including transcritical operation and the near-critical region, where thermophysical properties change rapidly.
Evaluate and select exchanger technologies (PCHE, microchannel, plate-fin, brazed plate, and shell-and-tube) for each duty, weighing thermal performance, cost, size, weight, and manufacturability.
Lead electronics cooling and cold plate design, including thermal and hydraulic performance, flow distribution, and integration with the facility cooling loop.
Develop and validate rating and sizing models, and work with the system modeling team so that exchanger performance is carried accurately into cycle COP and facility efficiency.
Lead the prototype-to-production process, including specifications, supplier selection, design reviews, test plans, and acceptance criteria.
Work closely with internal manufacturing and exchanger suppliers to scale production, driving design for manufacturability, process qualification, cost, lead time, and quality.
Own pressure equipment compliance for the heat exchangers, including ASME Section VIII, ASME B31.5, and applicable CO₂ refrigerant system requirements.
Design for field conditions, including shipping envelope, skid packaging, thermal transients, fouling, freeze and dry-out risk, and serviceability.
Support customer and partner technical discussions on exchanger performance and design decisions.
Leadership role will need to recruit and mentor engineers, and establish engineering standards for the heat exchanger team.