Senior Propulsion Engineer

Gravitics, Inc•Marysville, WA

9d•Onsite

About The Position

About Gravitics At Gravitics, we're not exploring space—we're building it. We're creating the infrastructure for a thriving space economy, enabling humanity to flourish beyond Earth. Our vision is bold, but we're not just dreamers; we're doers. We design and manufacture large-scale orbital structures that enable commercial operations while meeting the requirements of defense and government missions. Our systems are built to scale and built to last—bridging commercial innovation with mission-critical performance. If you're ready to lay the foundations for a new era in space, embrace a culture of relentless learning and innovation, and contribute to a future where humanity's reach extends farther, Gravitics is the place for you. Let's build the future together. About the Role We are looking for rockstars who can work the full product lifecycle of an in-space propulsion system from design through build and integration. You will own major fluid subsystems to develop a propulsion system that operates flawlessly regardless of the mission.

Requirements

5+ years of experience in mechanical or aerospace engineering
Bachelor’s degree in aerospace engineering, Mechanical Engineering, or another applicable field
Working knowledge of propulsion or fluid system components (feed systems, pressurization, valves, regulators, or similar)
Exposure to one or more of the following: Liquid or gas propulsion system design, Propellant management and fluid handling, Hardware assembly, integration, and functional testing, Thermodynamic or fluid dynamics analysis
Ability to understand structural, fluid, and thermal designs from first principles
Familiarity with CAD and FEA packages such as NX and NASTRAN or similar
Ability to thrive in a fast-moving environment with evolving requirements and a high degree of ownership

Nice To Haves

Background in feed system design, pressurant system sizing, or propellant budgeting
Hands-on experience assembling, integrating, and testing fluid system hardware
Familiarity with propulsion-specific test environments, including proof/leak testing, hotfire testing, or pressure system qualification
Experience conducting trade studies and optimizing propulsion system performance, weight, and reliability
Familiarity with combustion, propellant chemistry, or reaction control system (RCS) design
Experience with CFD, thermal fluid system modeling, and/or combustion modeling tools (e.g., Thermal Desktop, ANSYS Fluent, MATLAB/Simulink, ROCETS, GFSSP, CEA, TDK)
Experience in high-reliability or safety-critical fluid systems with formal verification and validation practices
Demonstrated ability to drive complex propulsion hardware from early design through acceptance testing
Prior experience at launch vehicle, spacecraft, or propulsion-focused organizations
Genuine enthusiasm for advancing propulsion technology and contributing to next-generation space systems
Proficient understanding of drafting standards and GD&T (ASME Y14.5)

Responsibilities

Design, build, and test propulsion fluid systems, including feed systems, tank pressurization, propellant management, and associated fluid components
Take ownership of propulsion subsystem architecture elements, from concept definition through hardware integration and test
Lead system-level trade studies to evaluate performance, weight, power, and cost
Plan and execute propulsion integration and test campaigns, including component, subsystem, and full vehicle testing
Generate and maintain engineering documentation such as requirements, interface control documents (ICDs), test plans, and fluid system schematics
Work cross-functionally with structures, thermal, avionics, and GNC teams to ensure propulsion system compatibility with vehicle-level performance
Support environmental qualification and acceptance testing, including thermal-vacuum, vibration, and leak/proof pressure testing