We engineer and build active phased-array communications systems, payloads, terminals, and fully integrated spacecraft—shipping hardware to defense and commercial customers.
CesiumAstro engineers, builds, and tests all hardware in-house under AS9100-certified processes, ensuring aerospace grade reliability and quality.
Our engineering spans the full stack — from RF and digital hardware to software and spacecraft systems. We design, build, and integrate cutting-edge technology that powers advanced communication solutions from Earth to orbit.
Play a direct role in shaping the next generation of space communications — designing and building systems that connect users across continents and orbits.
Our work spans across aerospace including defense, civil, and commercial markets — giving you the chance to solve complex challenges that matter on Earth and in orbit.


At CesiumAstro, teams own real flight hardware from concept to delivery. Engineering sits next to manufacturing for fast build-test-iterate cycles. We measure what matters.
Design with intent. Every product serves a mission.
Apply disciplined processes, document carefully, and deliver with precision.
Push boundaries through practical, scalable breakthroughs.
Track performance, learn from outcomes, and rapidly iterate.
With a culture of determination, we’re on a mission to advance space connectivity.

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Located in Bee Cave, 20 minutes from downtown Austin in the Texas Hill Country. Design, manufacturing, and test all under one roof with AS9100 labs, chambers, and multiple over-the-air ranges. Close collaboration between engineering, manufacturing, and programs enables rapid build-test cycles.
City perks: Live music capital of the world, food trucks and cuisine, lakes & Greenbelt trails, easy access to AUS airport
Based in Westminster, near Denver and Boulder. Spacecraft, avionics, systems, and terminal integration as well as manufacturing, engineering, and program management. Close proximity to Denver aerospace community.
City perks: Front Range lifestyle, hiking, skiing
Located in El Segundo, in close proximity to customers in the SoCal aerospace corridor. Design and system engineering, and business development.
City perks: Beach-town energy, mild coastal weather
Based in Milton Keynes. Waveform development, program management for European customer base.
City perks: Planned city with parks & lakes, extensive cycling paths, strong value vs. London
Located in Munich, serving as the European program and supplier hub. Growing office for engineering, business development, and program management.
City perks: Efficient rail/air network, strong engineering culture, vibrant festivals
Based in Tokyo. A business development hub for Japanese and Asia-Pacific markets.
City perks: World-class transit, walkable districts, renowned cuisine and arts
Benefits outside the U.S. vary by country.
We are an Equal Opportunity Employer. We value diverse backgrounds and experiences, including veterans. If you need a reasonable accommodation, please let us know during the process.

Many job roles require access to export-controlled technology. Where applicable, applicants must be a “U.S. person” (U.S. citizen, lawful permanent resident, or protected individual) per 8 U.S.C. 1324b(a)(3) or obtain necessary authorizations. See individual listings.