Senior Antenna and RF Research Engineer I

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 Senior Antenna and RF Research Engineer s to our team. The ideal candidate has both proficient system know‑how covering the entire chain from phased‑array antenna to IF, as well as deep experience in designing, simulating, building, and testing high‑frequency active phased array antennas. The primary focus is on, though not limited to, PCB‑based multi‑beam antenna systems for space and airborne applications. If you enjoy working in a startup environment and are passionate about developing leading‑edge antenna and RF hardware, we would like to hear from you.

As a member of the CesiumAstro advanced development team, you will be helping to define the company’s antenna technology roadmap and aligning research efforts with business development insights and company strategy. Tasks include keeping up to date with latest antenna research, proposing and contributing to concept studies, and presenting research results and strategies to stakeholders.

Job Requirements And Minimum Qualifications

• MSc or PhD degree (preferred) in electrical engineering.

• Minimum 2 years of industry or university research experience covering antenna design, RF systems design, and RF prototyping and test.

• Expert‑level proficiency in EM and RF systems simulation, optimizations and corresponding tools (as a minimum CST, HFSS, ADS).

• Expert‑level proficiency in at least one high‑level programming language like Matlab and Python.

• Expert‑level proficiency in antenna range and over‑the‑air measurements including setup, test planning, and calibration.

• Extensive hands‑on experience with lab instruments such as vector network analyzers, spectrum analyzers, signal generators, and oscilloscopes.

• Proven track record showing the ability to define work direction, track milestones, and demonstrate progress on large open‑ended projects.

• Outstanding written and verbal communication skills.

Preferred Experience

• Experience with EM/RF optimization software.

• Experience with EMI/EMC standards and test procedures.

• Metrology knowledge applicable to measurement result analysis.

• Aerospace electronics design, development, and qualification.

$115,000 - $135,000 a year

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 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.