Senior Propulsion Engineer

Voyager is an innovative space, defense, and national security technology company committed to advancing and delivering transformative, mission-critical solutions. We tackle the most complex challenges to unlock new frontiers for human progress, fortify national security, and protect critical assets to lead in the race for technological and operational superiority from ground to space.

The future belongs to those who build it. At Voyager Technologies, we’re building technologies that protect lives, expand frontiers and prepare us for what’s next. And we’re doing that with people who are wired to solve, build, adapt and lead. These roles are not for the faint of heart.

You’ll help lay the foundation for humanity's future. Join a culture where innovation thrives, curiosity is rewarded, and impact is real. We’re a company of doers, thinkers and builders, united by purpose and grounded in reality.

If you want to put your skills to work where the stakes are real and the mission is bigger than any one person, forge the future with Voyager.

Voyager wants you to be a critical contributor in the Mojave office to advance the development of propulsion systems for Voyager’s sub-orbital VTVL vehicles. You will be responsible for working directly on all aspects of the propulsion systems, from initial component and system sizing through design, analysis, fabrication, and test. You will regularly report to the Propulsion Lead on progress, as part of a joint propulsion team collaborating with the Pittsburgh office.

• Support the engineering team in the design and test of rocket propulsion systems using cryogenic propellants
• Size components of propulsion systems including combustion devices, valves, propellant feed lines, turbo machinery, tanks, and pressurization systems
• Design and analyze combustion device elements including injectors, combustion chambers, nozzles, gas generators, cooling channels, and related technology
• Build and run propulsion system fluid-thermal models to predict component and system behavior
• Perform trade studies to guide design and operational decisions
• Lead the creation of hardware drawings to support manufacturing
• Create component specifications to guide vendor interactions and support procurement
• Develop test plans, execute tests, and post-process results for component and system testing
• Contribute to and participate in technical readiness and safety reviews for testing activities
• Perform risk assessment and mitigation planning
• Write and present technical reports

• B.S. in Mechanical or Aerospace Engineering
• 6+ years of relevant experience in rocket propulsion system development
• Experience with cryogenic propellants (liquid methane and liquid oxygen preferred)
• Experience in designing and analyzing high-pressure fluid and/or pneumatic systems
• Proven capability to develop conceptual designs, perform trade studies, and down select to a design baseline

• M.S. in Mechanical or Aerospace Engineering
• Experience with a variety of cryogenic propulsion systems and various engine cycles
• Experience with Computational Fluid Dynamics (ANSYS Fluent or CFX preferred)
• Proficient in fluid/thermal software for rocket engine development (GFSSP, RTE, RPA) and for system level modeling (Amesim or Thermal Desktop)
• Familiar with CAD (Solid Works preferred) and lifecycle management tools
• Ability to take ownership of and prioritize tasks in a fast-paced environment with changing needs and requirements
• Experience with advanced rocket engine designs and concepts, especially RDRE’s
• Analytical/scientific programming (Python, C/C++, MATLAB, Fortran)
• Hands‑on fabrication skills and a willingness to be…