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 Principal Launch Vehicle Design Engineer II 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.