Senior Antenna Design Engineer

Senior Antenna Design Engineer I

Join to apply for the Senior Antenna Design Engineer I role at Cesium Astro
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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 Cesium Astro
, 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, Cesium Astro 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 Senior Antenna Design Engineer I to our team. The ideal candidate has experience in designing, simulating, building, and testing high‑frequency antennas made in printed circuit board (PCB) processes. If you enjoy working in a startup environment and are passionate about developing leading‑edge RF hardware for satellites, spacecraft, and aerospace systems, we would like to hear from you.

As a Cesium hardware team member, you will be responsible for antenna designs from initial concept through requirements definition, topology selection, detailed design, analysis, optimization, manufacturing, testing, qualification, and in‑orbit support of Cesium's products. The successful candidate will also present engineering design review materials to our customers and executive team, as well as participate in proposal‑writing efforts. Excellent written and verbal communication skills are required.

• Bachelor of Science (BS) degree or higher in Electrical Engineering or Physics from an accredited university or institution.
• Minimum of 4 years of industry or university research experience in antenna design, analysis, optimization, fabrication, and test. Minimum of 4 years of experience with a Masters degree. More experienced candidates are also encouraged to apply.
• Expert‑level proficiency in 3D electromagnetic simulation tools such as CST or HFSS.
• Strong experience with EDA tools such as Altium.
• Hands‑on experience with lab instruments such as vector network analyzers, spectrum analyzers, signal generators, and oscilloscopes.
• Excellent written and verbal communication skills.

• Antenna design in frequency bands above 20 GHz.
• Phased array design and development.
• Aerospace electronics design, development, and qualification.
• EMI/EMC design and mitigation techniques.
• We provide generous benefits and stock option packages to all our employees.

$110,000 - $150,000 a year

Cesium Astro 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 including health, dental, vision, HSA, FSA, life, disability and retirement plans.

Cesium Astro is an Equal Opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability, protected Veteran Status, or any other characteristic protected by applicable federal, state, or local law.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.