Senior Mechanisms Systems Engineer

At Relativity Space, we’re building rockets to serve today’s needs and tomorrow’s breakthroughs. Our Terran R vehicle will deliver customer payloads to orbit, meeting the growing demand for launch capacity. But that’s just the start. Achieving commercial success with Terran R will unlock new opportunities to advance science, exploration, and innovation, pioneering progress that reaches beyond the known. Joining Relativity means becoming part of something where autonomy, ownership, and impact exist at every level. Here, you're not just executing tasks; you're solving problems that haven’t been solved before, helping develop a rocket, a factory, and a business from the ground up. Whether you’re in propulsion, manufacturing, software, avionics, or a corporate function, you’ll collaborate across teams, shape decisions, and see your work come to life in record time. Relativity is a place where creativity and technical rigor go hand in hand, and your voice will help define the stories we’re writing together. Now is a unique moment in time where it’s early enough to leave your mark on the product, the process, and the culture, but far enough along that Terran R is tangible and picking up momentum. The most meaningful work of your career is waiting. Join us. About the Team: The Mechanisms Team at Relativity Space designs and delivers the complex, high-performance mechanical systems that enable launch-vehicle flight, landing, and reusability. We own the full lifecycle of mission-critical hardware—actuators, latches, and thrust vector control (TVC) systems—while partnering deeply with Guidance, Navigation Control (GNC), Avionics, and Software to create integrated, operable solutions. Our work spans concept development through design, analysis, test, flight operations, and recovery, always balancing performance, reliability, and build rate. About the Role: As a Senior Mechanisms Systems Engineer, you will be the technical and programmatic owner for large, cross-discipline mechanism systems such as thrust vector control. Reporting directly to the Mechanisms team, you will lead system-level design and integration, guiding requirements, architecture, and verification across hardware and software interfaces. You will: Define system concepts of operations (CONOPS), requirements, and verification plans Lead integrated product activities across mechanical design, actuators, GNC, avionics, and software teams to ensure seamless system performance Drive development tests, functional verification, and flight readiness by authoring test plans, executing tests, and establishing success criteria Anticipate technical and logistical risks, develop mitigation strategies, and align priorities across engineering disciplines and schedules Coordinate the design, manufacturing, integration, and test schedules for complex mechanism systems Take hands-on ownership of emergent challenges—whether designing test fixtures, specifying sensors, writing test automation, or leading root-cause investigations This role occasionally requires travel to test and launch sites and may involve shifted or weekend schedules to support critical milestones About You: Bachelor’s degree in Mechanical, Aerospace, or related engineering field and 5+ years of relevant experience in design, manufacturing, assembly, or test of complex mechanical or electromechanical systems Proven ability to lead multi-disciplinary projects and deliver on ambitious schedules Strong technical judgment and the ability to communicate complex concepts across engineering and leadership audiences Demonstrated experience balancing requirements, cost, and schedule while driving system integration and verification Nice to haves but not required: Background in actuator systems, flight mechanisms, or thrust vector control Experience with motor-control tuning and model-based design using MATLAB/Simulink Experience with integrated hardware/software testing and verification Familiarity with reu ... (truncated, view full listing at source)