Propulsion Senior Engineer – Pressure & Fluid Systems

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. Today, driven by the vision of leading humanity's journey off planet, Axiom Space is the principal provider of commercial human spaceflight services to the International Space Station and developer of advanced spacesuits for the Moon and low-Earth orbit. Axiom Space is building era-defining space infrastructure that drives exploration and fuels a vibrant space economy that will empower our civilization to transcend Earth for the benefit of every human, everywhere.

Axiom Space fosters a work environment inclusive of all perspectives. We are the pioneers of commercial space, leading the transformation of low-Earth orbit into a global space marketplace. Our mission-driven team is seeking a bold and dynamic Propulsion Senior Engineer – Pressure & Fluid Systems who is fueled by high ownership, execution horsepower, growth mindset, and driven to understand our world, science/technology, and life itself, for the benefit of all on Earth and beyond.

Position Summary

We are looking for 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.

Key Duties & Responsibilities

• Owns 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, interface 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.

Qualifications

To perform this job successfully, an individual must be able to perform each essential duty satisfactorily. The requirements listed below are representative of the knowledge, skill, and/or ability required. Reasonable accommodation may be made to enable individuals with disabilities to perform the essential functions.

Education & Experience

• 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

Grit

• Passion for space and the mission
• Entrepreneurial, growth mindset
• Perseverance
• Resourceful, adaptable

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

Competencies

Embody our core values of leadership, innovation, and teamwork. In addition, to perform the job successfully, an individual should demonstrate the following competencies:

• Accountability
• Sense of Urgency
• Extreme Ownership
• Execution and Delivery
• Efficiency
• Effectiveness

Work Environment

Generally, an office environment, but can involve inside or outside work depending on the task.

Requirements

• Must be able to complete a U.S. government background investigation
• Management has the prerogative to select at any level for which the position is advertised
• 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

Physical Requirements

• 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)
• Equipment and Machines
• Standard office equipment (PC, phone, printer, etc.)

Axiom Space is proud to be an equal opportunity employer. Axiom Space does not discriminate on the basis of race, regional color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with disability, or other applicable legally protected characteristics.