Propulsion Senior Engineer – Pressure & Fluid Systems

About the Role

Axiom Space is building the world’s first commercial space station – Axiom Station. Serving as a cornerstone for sustained human presence in space, this next-generation orbital platform fosters groundbreaking innovation and research in microgravity, and cultivates the vibrant, global space economy of tomorrow. We are seeking a resilient, high-energy, experienced Propulsion Senior Engineer – Pressure & Fluid Systems to own the end-to-end technical execution of a bipropellant feed system from requirements definition through design, build, integration, test, and flight readiness. You will lead cross-functional teams and suppliers to deliver to aggressive cost and schedule targets while maintaining safety and configuration discipline.

The ideal candidate combines deep hands-on propulsion hardware experience with strong technical leadership, clear communication, and a bias for execution.

Responsibilities

• Own the end-to-end technical execution of spacecraft pressure control and fluid systems – including COPVs, flow control devices (valves, regulators, manifolds, filters) from requirements through design, build, integration, test, and flight readiness.
• Serve as a subject matter expert in propellant feed system and pressurization system design, providing technical authority on system architecture, component selection, and interface definition across the development lifecycle.
• Perform detailed modeling, analysis, and simulation of fluid systems using tools such as GFSSP, ANSYS, Fluent to evaluate system performance, fluid dynamics, thermal effects, and transient behaviors.
• Perform detailed sizing and selection of fluid system components, ensuring compatibility with performance, environmental, material, and other requirements.
• Define, plan, and execute system and component-level tests including development, qualification, and acceptance testing; anchor analytical models and validate simulations against test data.
• Lead and participate in internal and external design and gate reviews, trade studies, and subassembly integration activities; ensure compliance with system requirements and program milestones.
• Coordinate and manage technical requirements and design certification activities with external vendors and suppliers, interfacing on cost, schedule, design, manufacturing, and acceptance.
• Define and control functional and physical interfaces between the fluid/pressure systems and vehicle-level systems, collaborating with structures, thermal, avionics, and software teams.
• Provide technical mentorship and guidance to less experienced engineers.
• Responsible for delivering against safety, cost, and schedule targets.

Requirements

• Bachelor’s degree from an accredited college or university in Aerospace, Mechanical, or related Engineering discipline required; advanced degree preferred.
• 7+ years of relevant experience with demonstrated depth in pressure control and fluid systems design.
• Significant hands-on experience with propellant feed system design, development, qualification, and integration, including COPVs, valves, regulators, filters, manifolds, and instrumentation.
• Expertise in fluid dynamics, thermodynamics, and heat transfer with demonstrated application to propulsion systems.
• Experience with oxygen compatibility requirements and assessments.
• Experience coordinating with external vendors on technical requirements, design verification, cost, and schedule performance.
• 3D modeling software experience: SolidWorks preferred.
• Must be able to complete a U.S. government background investigation.
• Proof of U.S. Citizenship or US Permanent Residency is a requirement for this position.
• Must be willing to work evenings and weekends as needed to meet critical project milestones.

Skills

• Executes priorities with precision and pace.
• High EQ and ability to collaborate within teams and cross-functionally.
• Tech-savvy in using systems and tools to move faster and smarter.
• Excellent written and verbal communication skills.
• Grit, passion for space, and the mission.
• Entrepreneurial, growth mindset.
• Perseverance and resourcefulness.

Competencies

• Accountability
• Sense of Urgency
• Extreme Ownership
• Execution and Delivery
• Efficiency
• Effectiveness
• Embody core values of leadership, innovation, and teamwork.

Work Environment

• Generally, an office environment, but can involve inside or outside work depending on the task.
• Work may involve sitting or standing for extended periods (90% of the time).
• May require lifting and carrying up to 25 lbs. (5% of the time).
• Standard office equipment (PC, phone, printer, etc.).