Thermal Jobs

Senior Test Engineer needed to design and build automated test frameworks and integrated test systems (Python, LabVIEW, DAQ) for motion control hardware in support of spaceflight and production environments.

Lead a mechanical design team at Shield AI to develop flight-critical electro-mechanical systems and drive structural, thermal, and integration excellence for next-generation autonomous UAVs.

KLA’s LS-SWIFT team seeks a Mechanical Design Engineer to drive optomechanical and precision-mechanism development from concept through prototype and production handoff.

Antares seeks a hands-on Test Engineer II / Senior Test Engineer to architect and execute test stands, instrumentation, and data workflows for the R1 microreactor program at our Torrance facility.

Lead electrical design and system integration as an early hardware engineer on a stealth-stage consumer hardware team based in New York.

Senior Mechanical Engineer (Thermal) to own thermo-mechanical hardware design, analysis, and testing for Helion's fusion generator at the Everett, WA site.

Lead the mechanical design and analysis of critical hardware subsystems for Helion's fusion devices, working onsite in Everett with a fast-moving, multidisciplinary team.

Lead the architecture, testing, and scale-up of high-voltage, pulsed-power capacitors to enable Helion’s transition from prototypes to the world’s first commercial fusion power plant.

Lead and grow a multidisciplinary structural engineering team at Helion's Everett facility to design and deliver high-performance structures and shielding for next-generation fusion devices.

Helion Energy seeks a Senior Mechanical Engineer (Fluids) to lead design, analysis, and hands-on implementation of fluid and thermal hardware for its fusion generators at the Everett, WA site.

Lead Helion Energy’s Balance of Plant engineering in Everett, WA, building and directing teams to design and deliver the mechanical, thermal, and fluid systems that make fusion power plants operational.

Lead the fuel cycle engineering team in Everett to design, validate, and deliver the separation, vacuum, and cryogenic systems that will enable Helion’s Orion fusion power plant.

Lead mechanical design, analysis, and hands‑on prototyping of Helion's fusion generator subsystems at the Everett, WA engineering team.

Zoox is hiring System Engineering Interns to support verification, powertrain, and system integration projects for its autonomous electric vehicle platform.

Anduril is hiring a detail-oriented Mechanical Engineer to perform CAD design, FEA structural and thermal analysis, and support the development and production of solid rocket motor components in its TRS division.

Work on cross‑disciplinary teams at a fast‑paced defense technology company to design, automate, and maintain production tests that assure the quality of complex electro‑optical systems.

Lead the design, prototyping, testing, and production of mechanical subsystems for advanced autonomous drones and propulsion systems at Anduril's Costa Mesa HQ.

Lead end-to-end development and production of solid rocket motors as Chief Engineer at Anduril, driving technical direction and program execution for tactical and space propulsion efforts.

Shield AI is hiring a Senior Staff Mechanical Test Engineer to lead design, validation, and sustainment of mechanical test and ground support systems for high-reliability UAS flight hardware.

Relativity Space is hiring a Staff Turbomachinery Engineer to lead turbine design and analysis efforts for turbopumps powering the Terran R rocket.

Lead the design and validation of rugged mechanical and structural test systems for next-generation autonomous aircraft at a fast-paced, mission-focused aerospace company.

Lead battery pack product development and scale multiple engineering teams to deliver safe, high-volume lithium-ion battery packs for ALSO’s small EV platforms.

Blue Origin is seeking a hands-on Mechanical Engineer III in Seattle to design and deliver avionics harnesses and mechanical assemblies for the New Shepard suborbital vehicle.

Lead the design, modeling, testing, and integration of advanced heat pipe systems for Antares' R1 microreactor, applying deep thermal engineering expertise to deliver reliable high-temperature two-phase heat transfer solutions.

An onsite Summer 2026 Mechanical Engineering intern role at CesiumAstro focused on designing and testing space structures and thermal systems for satellite communication hardware.

Lead and scale Neurophos' product engineering organization to commercialize high-volume silicon photonics and co-packaged optical AI modules from prototype to production.

Work on thermal-fluids modeling and CFD-driven design for a fast-moving microreactor program at Antares' Torrance R&D and production facility (US work-authorization required).

Lead the structural and thermal design, analysis, testing, and qualification of launch vehicle hardware as a Principal Launch Vehicle Design Engineer II at a fast-moving aerospace startup.

Experienced mechanical engineer needed to drive electronics packaging and spacecraft hardware design, analysis, and qualification for CesiumAstro’s satellite and airborne communication products.

Design complex HDI SSD PCBs for SanDisk's enterprise storage products in Irvine, working across global engineering teams to deliver production-ready ODB++/Gerber outputs.

Customer-Centric

Mission Driven

Inclusive & Diverse

Rise from Within

Diversity of Opinions

Work/Life Harmony

Growth & Learning

Transparent & Candid

Medical Insurance

Paid Time-Off

Maternity Leave

Mental Health Resources

Equity

Child Care stipend

Paternity Leave

WFH Reimbursements

Flex-Friendly

Dental Insurance

Vision Insurance

Life insurance

Health Savings Account (HSA)

Flexible Spending Account (FSA)

401K Matching

Military leave

Lead a distributed datacenter team to plan, build, and operate NVIDIA’s private cloud infrastructure supporting AI and HPC workloads across global sites.

CesiumAstro seeks a Principal Spacecraft Mechanical Engineer II to lead mechanical design, qualification, and cross-functional execution for next-generation communications satellites.

Experienced mechanical engineer needed to lead design, analysis, fabrication and test activities at an early-stage company building advanced hardware systems.

Lead program planning and operations for the SLD thermal control system, ensuring on-time, on-budget delivery through schedule and cost management and cross-functional coordination.

Faith Technologies is hiring a Mechanical Engineer I to support mechanical design of power system products using SolidWorks and engineering analysis under the supervision of senior engineers.

Monarch Quantum is hiring a hands-on Mechanical Engineer 2 to design, analyze, fabricate, and test mechanical systems while helping scale engineering practices in a fast-moving startup.

Lawrence Livermore National Laboratory is hiring Mechanical Engineers to develop, test, and support mechanical systems and components for national security programs.

Blue Origin seeks a Senior Mechanical Engineer to own the development and integration of thermal components for the Blue Moon Crew Lander on the Lunar Permanence team.

Experienced electrical designer needed to develop and sustain power distribution equipment, focusing on schematics, BOMs, thermal and mechanical integration, and safety certification support.

Blue Origin is hiring a Senior Spacecraft Thermal Engineer (Active Top Secret required) to lead thermal system architecture, modeling, and test support for the Blue Ring in-space platform.

Overview Energy seeks a Mechanism Engineer in Ashburn to own the design, qualification, and flight support of deployable and articulating spacecraft mechanisms.

Advance fusion energy by leading technical execution and shipside manufacturing support for the SPARC Toroidal Field Coil winding pack at Commonwealth Fusion Systems.

Lead thermal architecture and materials/contamination strategy for space optics to ensure optical performance and manufacturability across mission environments.

Lead technical sales engagements for an AI-driven thermal simulation platform, partnering with customers to demonstrate value, run proof-of-concepts, and accelerate hardware design decisions.

Inclusive & Diverse

Rise from Within

Mission Driven

Diversity of Opinions

Work/Life Harmony

Transparent & Candid

Growth & Learning

Fast-Paced

Collaboration over Competition

Take Risks

Friends Outside of Work

Passion for Exploration

Customer-Centric

Reward & Recognition

Feedback Forward

Rapid Growth

Medical Insurance

Paid Time-Off

Maternity Leave

Mental Health Resources

Equity

Paternity Leave

Fully Distributed

Flex-Friendly

Some Meals Provided

Snacks

Social Gatherings

Pet Friendly

Company Retreats

Dental Insurance

Life insurance

Health Savings Account (HSA)

Provide afterhours remote IT support to One Medical clinical and corporate users, troubleshooting hardware and software across Windows, macOS, and Chrome OS environments.

Boston Materials is hiring a hands-on Computer Engineer II to build, modify, and test GPU/AI hardware and automate thermal data collection to advance next-generation thermal interface materials.

Mission Driven

Social Impact Driven

Passion for Exploration

Reward & Recognition

Work hands-on on Dragon 2 vehicle integration and test, ensuring subsystem interfaces, manufacturability, and flight readiness for crewed missions.

Lead and own CFD-driven thermal-fluid analysis for heat exchangers at Last Energy, turning simulations into design decisions that guide productized nuclear plant hardware.

Sunlighten seeks an experienced Electrical Engineer to lead hardware and embedded development for wellness products, driving designs from concept through commercialization at our Leawood, KS headquarters.

Gensler’s New York Design Technology Studio is hiring a Design Technology - Computation Lead to drive ML-enabled computational design workflows, data integration, and performance-focused analysis for high-performance projects.