Staff Propulsion Engineer

Please Note: To conform with the United States Government Space Technology Export Regulations, the applicant must be a U.S. citizen, lawful permanent resident of the U.S., conditional resident, asylee or refugee (protected individuals as defined by 8 U.S.C. 1324b(a)(3)), or eligible to obtain the required authorizations from the U.S. Department of State.

At CesiumAstro, we are developers and pioneers of out-of-the-box communication systems for satellites, UAVs, launch vehicles, and other space and airborne platforms. We take pride in our dynamic and cross-functional work environment, which allows us to learn, develop, and engage across our organization. If you are looking for hands-on, interactive, and autonomous work, CesiumAstro is the place for you. We are actively seeking passionate, collaborative, energetic, and forward-thinking individuals to join our team.

We are looking to add a Staff Propulsion Engineer to our team. If you enjoy working in a startup environment, and have expertise in the structural and thermal design of launch vehicle (LV) components and systems, including tanks, fairings, and related hardware, we would like to hear from you

In this position, you serve as a subject matter expert, overseeing subsystem development from concept through flight, while ensuring compliance with performance, safety, and reliability requirements. This role requires both deep technical expertise and the ability to guide and mentor engineering teams within a fast-paced start-up environment.

The ideal candidate will have a strong background in FEA and thermal simulations, combined with hands-on experience in experimental development and testing of high-performance aerospace systems. This role involves close collaboration with an international R&D team to optimize performance and reliability of LV hardware.

JOB DUTIES AND RESPONSIBILITIES • Lead the design, analysis, and development of primary and secondary launch vehicle structures, stage interfaces, and payload accommodations.

• Perform static and transient structural and thermal analysis of LV components and systems to ensure mechanical integrity under operational loads. • Develop and execute test programs, analyze experimental data, and apply findings to optimize designs. • Prepare CAD models for FEA analysis and manufacturing. • Generate technical documentation, including reports, specifications, and contributions to PDRs and CDRs. • Collaborate across mechanical, aerospace, and controls engineering teams to deliver flight-ready systems. • Mentor junior and senior engineers to build technical understanding and professional development. • Participate in mission operations, anomaly investigations, and continuous improvement initiatives.