Principal Spacecraft Systems Engineer I

Austin, TX
Engineering – Systems /
Full-time /
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 Principal Spacecraft Systems Engineer I to our team. If you enjoy working in a startup environment and are passionate about developing leading-edge phased arrays for satellites, spacecraft, and aerospace systems, we would like to hear from you.
The ideal candidate will have a strong background in system engineering, experience in space technology, and the ability to be the technical point of contact for a spacecraft subsystem. You will coordinate activities across multidiscipline engineering teams, raise issues at the program level, and help drive complex programs to success.


    • Lead the conceptualization, design, and development of satellite systems, including spacecraft buses, payloads, and subsystems, from initial requirements to final implementation.
    • Decompose system requirements to applicable spacecraft subsystems.
    • Conduct trade studies and design reviews to evaluate design alternatives, assess technical risks, and optimize system performance, cost, and schedule.
    • Develop space vehicle concept of operations (CONOPS).
    • Collaborate with cross-functional teams to integrate subsystem designs and components into cohesive satellite architectures.
    • Participate in development of system engineering processes for requirements management, flow down, and traceability.
    • Perform risk analysis and develop mitigation strategies.
    • Identify and resolve issues that may impede the progress of engineering teams.
    • Foster a culture of efficiency and continuous improvement within our programs.


    • Bachelor's degree in Aerospace Engineering, Mechanical Engineering, Electrical Engineering, or a related field.
    • A minimum of 9 years of experience with emphasis in spacecraft design.
    • Knowledge of spacecraft subsystems, including avionics, power systems, propulsion, thermal control, communication, and attitude determination and control (ADCS).
    • Strong understanding of satellite system architectures, mission requirements, and space environment considerations.
    • Excellent problem-solving skills and analytical abilities, with the capability to identify, assess, and resolve complex technical challenges and design issues.
    • Experience with a requirements management tool such as DOORS or Jama.
    • Ability to define work direction, track milestones, and demonstrate progress on large open-ended projects.
    • Sense of urgency, with the ability to work well under pressure.
    • The ability to work well with multidisciplinary teams.
CesiumAstro considers several factors when extending an offer, including but not limited to, the role and associated responsibilities, a candidate’s work experience, education/training, and key skills. Full-time employment offers include company stock options and a generous benefits package featuring health, dental, vision, HSA, FSA, life and retirement plans. 
CesiumAstro, Inc. is an Equal Opportunity/Affirmative Action employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex including sexual orientation and gender identity, national origin, disability, protected Veteran Status, or any other characteristic protected by applicable federal, state, or local law.