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Salary
$113k – $136k per year
Location
In office (Westminster)
Seniority
Middle
Visa
H-1B filings in 12 months: 2
Employment
Full-Time

Confirmed on the employer's own hiring board on Nov 11, 2026. First seen by Alion on Aug 24, 2026. CesiumAstro scores A on the Alion truth index.

Overview
Company
Impact
Profile match
CesiumAstro is an American company founded in Austin in 2017 that builds active phased array communications payloads for satellites, aircraft and defence platforms. Its systems are software-defined and electronically steered, which lets a moving platform track several links at once without mechanical antennas, and the company manufactures them in house rather than integrating third-party subsystems. It sells mainly to defence customers and satellite operators, has raised venture funding from investors including Airbus Ventures and Lightspeed, and operates facilities in Austin, Colorado and the United Kingdom.

We are looking to add a GNC Engineer II to our team. If you enjoy working in a startup environment and are passionate about developing systems for leading-edge spacecraft, and aerospace communication systems, we would like to hear from you.

In this position, you will work on a small team in the design and analysis of GNC systems for CesiumAstro satellites and payloads. You will be responsible for Guidance, Navigation, and Control through all stages of design, integration, test, and operations. As such, you will perform trade studies, participate in design reviews, create models, and complete simulations and system testing. You will build, test, and fly hardware.

As a CesiumAstro spacecraft team member, you will work on a small team to develop satellites and put them in orbit. Being in a startup, you can expect significant portions of your time to be spent contributing to company-critical projects outside your area of expertise.

KEY REQUIREMENTS:

  • Master of Science (MS), or Doctorate (Ph.D.) degree in Aerospace Engineering from an accredited university or institution
  • 2 years of internship, research, or industry experience in satellite attitude and orbit systems
  • Expertise in attitude estimation, guidance, and control; coordinate frame transformations; linear algebra; and non-linear systems
  • Experience with multiple spaceflight missions from concept to operations
  • Experience in low earth orbit satellites
  • Experience with post-CDR test failures and on-orbit failures that guide your design and test philosophies
  • Experience with successful and unsuccessful recovery from on-orbit failures
  • Experience in conceptualization, architecture design, requirements specification, design, test, and operations of various GNC architectures and components
  • Familiarity with space mission simulation tools such as STK, Basilisk, GMAT, or FreeFlyer
  • Experience defining spacecraft trajectories and orbital requirements
  • Fluency with Python and C++, or other modeling languages
  • Familiarity with spacecraft mission design including events, pointing modes, maneuver planning, and operations
  • Excellent written and verbal communication skills

PREFERRED EXPERIENCE:

  • CubeSat and SmallSat experience
  • Hands-on experience with spacecraft instrumentation, subsystems, and test labs
  • Experience with multiple mission simulation and flight architectures which drives your vision for the next generation of space software
  • Experience in LEO, MEO, GEO, and deep space satellites
  • Experience with communications satellites
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