Thermal Control System (TCS) Design Engineer Los Angeles, CA

Thermal Control System (TCS) Design Engineer K2 is building the largest and highest-power satellites ever flown, unlocking performance levels previously out of reach across every orbit. Backed by $450M from leading investors including Altimeter Capital, Redpoint Ventures, T. Rowe Price, Lightspeed Venture Partners, Alpine Space Ventures, and others – with an additional $500M in signed contracts across commercial and US government customers – we’re mass-producing the highest-power satellite platforms ever built for missions from LEO to deep space. The rise of heavy-lift launch vehicles is shifting the industry from an era of mass constraint to one of mass abundance, and we believe this new era demands a fundamentally different class of spacecraft. Engineered to survive the harshest radiation environments and to fully capitalize on today’s and tomorrow’s massive rockets, K2 satellites deliver unmatched capability at constellation scale and across multiple orbits. With multiple launches planned through 2026 and 2027, we're Building Bigger to develop the solar system and become a Kardashev Type II (K2) civilization. If you are a motivated individual who thrives in a fast-paced environment and you're excited about contributing to the success of a groundbreaking Series C space startup, we’d love for you to apply. The Role You will own the success of developing,implementingand testingbothR&D and productionthermal control systemson the spacecraft.You willbe responsible forspearheading the design andverificationefforts of activeand passivethermal control systemsincluding,but notlimited to,pumpfluidloops,heat pipesandall oftherequiredground supporting equipment (test fixtures,diagnostic equipment,instrumentation, software tools etc.).Y our work will require familiarity with pressurized systems (valves, pumps, accumulators, heat exchangers), thermo-mechanicalinstrumentation(temperaturesensors,pressure sensors, flow metersetc.),integratedelectronics systems,and secondary satellite structures. You will partner with design engineersearly on in theprocess to ensure manufacturabilitywhilebuildingthe first prototype, design the build flow, andfinalizethe process for transition to production. Responsibilities Work withlead engineerstodesign active and passive thermal control systems using basic heat transferand mechanical equations tosize lines, pumps, accumulators, cold platesetc. Planningand development of thermal cycle and thermal-vacuum testing campaigns Design and develop ment of heaterand coolingsystems including controlarchitecture Setup, commission, andmaintainstate-of-the-arttest standsand instrumentation Developdata acquisition systems for active and passive thermal control systems Perform tests on novelpump fluid l oopincludingfeedsystems, power electronics, and hardware-in-the-loop Develop testing and control scripts to conduct safe and reliable test campaigns ofpump fluid loopandindividualcomponents Create formal documentation for development and production: test procedures, testreports,andstandard operating procedures Troubleshoot electrical and mechanical test setups and hardware Document, compile, analyze, and present test data Qualifications 3+ years ofexperience with thermal test experience in ahigh-ratemanufacturingenvironment 2+ years of experience with sizing and testing fluid systems including pumps, valves, accumulators, heat exchanger, cold plates etc. Demonstratedexperiencewith data acquisition for thermal and power related applications Experiencewith test plandevelopmentand execution Strong experiencewith thermal and TVAC testing including setup,instrumentation,and troubleshooting Demonstrated knowledge of NX or AutoCAD is preferred to design test fixtures Nice to Have Experie nce with basic and statistical data analysis Experience with Thermal Desktopfor thermal analysis Experience with signal conditioning to defineoptimalacquisition rate and understand when sign al-to-noise ratio is not acceptable Experience withpumps testing Experience with avionics testing Experience with testingrefrigerationsystems Compensation and Benefits: Base salary range for this role is $100,000 - $215,000 + equity in the company Salary will be based on several factors including, but not limitedto:knowledge and skills, education, and experience level Comprehensive benefits package including paid time off, medical/dental/vision/ coverage, life insurance, paid parental leave, and many otherperks If you need a reasonable accommodation as part of your application for employment or interviews with us, please let us know. Export Compliance As defined in the ITAR, “U.S. Persons” include U.S. citizens, lawful permanent residents (i.e., Green Card holders), and certain protected individuals (e.g., refugees/asylees, American Samoans). Please consult with a knowledgeable advisor if you are unsure whether you are a “U.S. Person.” The person hired for this role will have access to information and items controlled by U.S. export control regulations, including the export control regulations outlined in the International Traffic in Arms Regulation (ITAR). The person hired for this role must therefore either be a “U.S. person” as defined by22 C.F.R. § 120.15 or otherwise eligible for a federally issued export control license. 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