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Salary
≈ $107k – $213k per year (Estimated)
Location
In office (Melbourne)
Seniority
Staff · 8+ years exp
Visa
H-1B filings in 12 months: 2
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 14, 2026. First seen by Alion on Oct 13, 2026. CesiumAstro scores A on the Alion truth index.

Overview
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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 Staff Mechanical Engineer to our Mechanical Engineering team. If you enjoy working in a startup environment and are passionate about developing space hardware for leading-edge communications satellites, we would like to hear from you.

In this position, you will be responsible for mechanical design aspects of Cesium phased array antennas, subsystems, and interfaces through all phases of the development process. The ideal candidate will be versatile and proficient in mechanical analysis, electronics packaging, computer-aided design (CAD), mechanical interfaces, thermal architecture, spacecraft propulsion, deployable and actuated structures, and environmental qualification of spacecraft antennas and payloads. You will be responsible for mechanical designs from concept through space flight including requirements definition, architecture trades and block diagrams, analysis, manufacturing, testing, qualification, and in-orbit support.

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.

JOB REQUIREMENTS AND MINIMUM QUALIFICATIONS

    • Bachelor of Science (BS) in Mechanical or Aerospace Engineering from an accredited university or institution
    • Minimum of 8 years of experience in space antenna and payload mechanical engineering to include electronics packaging, thermal, shock, vibration, stress dynamics, and cost. A Master's degree may count as two years of experience.
    • Experience in conducting architectural trade studies including parametric and first-order cost and physical analysis
    • Experience with professional mechanical and FEA CAD tools, such as Ansys Mechanical, SolidWorks Simulation, and Thermal Desktop
    • Experience with CNC manufacturing and GD&T
    • Experience with advanced aerospace manufacturing and materials including sandwich panels and carbon composites, OR experience with high-reliability deployment mechanisms for space applications (including deployment, HDRMs, power delivery, etc.).
    • Proficiency in detailed mechanical design (3D CAD, drawings, etc.)
    • Experience designing and manufacturing mechanisms and mechanical actuators
    • Experience with EMI/EMC mitigation techniques
    • Familiarity with satellite thermal architectures including heat pipes, phase change materials, contact resistance, and surface finishes as well as fundamental understandings of orbital thermal control in a LEO environment.
    • Familiarity with launch and LEO environments (thermal, shock, vibe, radiation, etc)
    • Familiarity with design for test, manufacturability, assembly, and reliability
    • Excellent written and verbal communication skills

PREFERRED EXPERIENCE

    • Python, C++, or other programming languages
    • Experience with large, deployable antenna arrays which drive your vision for the next generation of on-orbit communications and sensor arrays.
    • Robotics and control systems experience
    • PCBA experience.
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