
Compensation
$150,000–$200,000/year
Job Description
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 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 work will include many aspects of phased array communication systems, including RF front-ends, beamformers, power dividers, and phased array antennas.
The successful candidate will also present engineering design review materials to our customers and executive team, as well as participate in proposal-writing efforts. As such, excellent written and verbal communication skills are required.
Optimize Your Resume for This Job
Get a match score and see exactly which keywords you're missing
Job Details
- Category
- Mechanical
- Employment Type
- Full Time
- Location
- Westminster, CO
- Posted
- Compensation
- $150,000 - $200,000 per year
About CesiumAstro
CesiumAstro builds multi-beam phased array communication systems for satellites, aircraft, and ground vehicles, providing high-bandwidth data links for defense and commercial missions.
More Roles at CesiumAstro

CesiumAstro
Aerospace Engineering
Senior RF Test Engineer II
Westminster, CO$134K - $161K Full Time
15 hours ago
Aerospace Engineering
15 hours ago
CesiumAstro
Aerospace Engineering
Principal Electronics Test Engineer I
Westminster, CO$158K - $189K Full Time
15 hours ago
Aerospace Engineering
15 hours ago
CesiumAstro
Aerospace EngineeringGNC
Guidance, Navigation, & Control (GNC) Engineer II
Austin, TX Internship
19 hours ago
Aerospace EngineeringGNC
19 hours ago
CesiumAstro
Mechanical
Mechanical Engineer I
Austin, TX Full Time
1 day ago
Mechanical
1 day ago
CesiumAstro
Supply Chain
Associate Manager, Production & Material Planning
Westminster, CO$95K - $112K Full Time
5 days ago
Supply Chain
5 days agoSimilar Mechanical Roles

GITAI
Mechanical
Mechanical Engineering Intern / Co-op, Rocket Motors - Fall 2026
Los Angeles, CA$25 - $40/hour Internship
8 hours ago
Mechanical
8 hours ago
Radiant
Mechanical
Loads & Dynamics Engineer
El Segundo, CA$107K - $146K Full Time
9 hours ago
Mechanical
9 hours ago
Radiant
Mechanical
Staff Loads & Dynamics Engineer
El Segundo, CA$163K - $229K Full Time
9 hours ago
Mechanical
9 hours agoFound this role interesting?