Fluid Systems Engineering

Vast is developing next-generation space stations and space infrastructure using an incremental, hardware-rich, and low-cost approach. Vast is rapidly developing its multi-module Haven Station to ensure a continuous human presence in space for America and its allies, enabling advanced microgravity research and manufacturing, and unlocking a new space economy for government, corporate, and private customers. Haven Demo’s 2025 success made Vast the only operational commercial space station company to fly and operate its own spacecraft.

Next, Haven-1 is expected to become the world’s first commercial space station when it launches in 2027, followed by additional Haven modules. Additionally, the company recently announced Vast Satellite
, a high-power satellite product line leveraging its space station components and the heritage of Haven Demo.

Headquartered in Long Beach, California
, and with more than 1,000 employees and over a billion dollars in private capital, Vast has built the facilities required to manufacture and operate America’s next space station. The company plans to develop future habitats and systems for the Moon and Mars, dedicated space stations for government partners, and other crewed systems that will unlock the expanding long-term space economy.

Vast is looking for a Fluid Systems Engineer to support the design, development, manufacturing, and integration of fluid systems across our space station and spacecraft programs. Our fluid systems span environmental and thermal control (ECLSS/TCS), pressurized gas and propellant systems, electric propulsion feed systems, and ground support equipment — all of which are absolutely critical to the safety, performance, and reliability of our crew and spacecraft.

As a Fluid Systems Engineer at Vast, you will work hands-on alongside technicians, manufacturing engineers, and cross-functional teams to bring fluid systems to life in a fast-paced, high-ownership environment. The ideal candidate thrives in ambiguity, brings deep hands-on experience with fluid hardware, and can move fluidly between design, analysis, and the shop floor.

This is a full-time, exempt position located at our Long Beach office.

• Own design, development, and delivery of fluid system hardware from concept through flight across ECLSS, TCS, or propulsion programs
• Perform fluid analyses, trade studies, and systems engineering tasks using first principles to drive clear design decisions
• Design and develop pressurized hardware including tanks, valves, regulators, pumps, heat exchangers, tubing, and fittings
• Execute build, assembly, and integration of fluid hardware on the shop floor alongside technicians
• Support proof, leak, functional, and environmental testing including pressure decay, helium leak, burst, and TVAC
• Disposition nonconformances and drive root cause investigation and corrective action
• Interface with power, thermal, GNC, and avionics teams to ensure clean subsystem integration
• Lead design reviews with internal teams, suppliers, and customers

• Bachelor's degree in Mechanical Engineering, Aerospace Engineering, Civil Engineering, Electrical Engineering, Materials Engineering, Physics, Mathematics, or a related technical discipline
• Experience with fluid, pressurized, propulsion, or environmental control hardware in design, manufacturing, or test
• Hands-on fabrication, assembly, integration, and/or testing experience
• CAD proficiency (NX preferred)
• Strong problem-solving, root cause analysis, and communication skills

• Direct ownership of flight or high-reliability fluid hardware from design through test
• Hands-on experience with AN/MS/VCR fittings, brazed and welded joints, valves, pumps, heat exchangers, and…