Associate RF System Integration Engineer

About AST SpaceMobile

AST SpaceMobile and our global partners are building the first and only space-based cellular broadband network to be accessible by standard smartphones. Called SpaceMobile, this ultra-powerful network is being designed to provide connectivity at 4G/5G speeds everywhere on the planet – on land, at sea and in flight.

Responsibilities

Associate

• RF Assembly, Integration, and Test (AIT) Engineer to execute, integrate, test, and debug flight RF hardware supporting a fast-paced LEO satellite program at AST SpaceMobile.
• This is a hardware-centric execution role. The selected candidate will personally build, integrate, verify, troubleshoot, and support RF systems from bench validation through launch operations. You will partner directly with TT&C and GPS design leads who own system architecture and requirements, translating released designs into robust, flight-ready hardware.
• This is not a documentation or coordination position — it is a build, test, and fix role.
• RF Assembly, Integration & Test Execution
• Execute integration and verification testing for TT&C and GPS flight hardware.
• Flight radios and transceivers
• Flight antennas
• RF harnessing and coaxial assemblies

AIT RF racks and ground support equipment (GSE)

• Work directly from released schematics, ICDs, and mechanical interfaces.
• Verify RF performance margins, interface integrity, and system compliance through empirical hardware testing and data analysis.
• Hands-On Manufacturing & Build Support
• Personally drive RF hardware build, inspection, integration, and rework activities.

Coaxial cable assemblies

• Connector terminations (SMA, TNC, N-type, etc.)
• Harness routing, clamping, torque application, and strain relief implementation
• Maintain active presence on the manufacturing floor during hardware builds.
• Partner with manufacturing engineers and technicians to ensure workmanship standards.
• Identify and arrest integration escapes, workmanship defects, and latent hardware risks before propagation.
• AIT, Test, Debug & Automation
• Design, assemble, and sustain AIT RF racks and associated test infrastructure.
• RF functional testing

End-to-end TT&C and navigation test configurations

• Return loss, insertion loss, isolation, power output, and sensitivity measurements
• Automate repetitive RF test sequences and structured data capture
• Improve repeatability, throughput, and configuration traceability
• Thermal vacuum (TVAC)
• Vibration
• Thermal cycling
• Spacecraft integrated testing
• Debug harness, connector, and integration defects
• Identify workmanship-induced damage
• Isolate EMI/RFI coupling issues under schedule pressure
• When hardware fails during test, personally execute root cause isolation and corrective rework.

Acceptance, Readiness & Launch Support

• Execute formal acceptance testing per released procedures and qualification requirements.
• Review test data packages, close discrepancy reports, and verify flight readiness.
• Support launch site operations, including last-minute RF troubleshooting and configuration validation.

What Winning Looks Like

• RF hardware integrates cleanly and predictably in AIT.
• Issues are identified early, debugged efficiently, and closed with permanent corrective action.
• RF systems perform consistently from bench validation → environmental test → launch → orbit.
• You can point to the spacecraft and confidently state: “I built and tested that system.”
• RF assemblies and coax harness fabrication

Antennas and RF subsystems

• RF test equipment (VNA, spectrum analyzer, power meters, signal generators)
• Experience supporting AIT, environmental test campaigns, and production manufacturing.
• RF Signal Generators
• Power Meters

Requirements

• BS or MS in Electrical Engineering, or equivalent demonstrated hands-on RF experience.
• Practical RF experience across common TT&C frequency bands.
• High ownership mentality with strong bias toward execution.
• Detail-oriented while maintaining schedule awareness.
• Pragmatic decision-making in ambiguous or data-limited environments.
• Collaborative across design, manufacturing, and test organizations.
• Calm and methodical under hardware anomaly pressure.
• RF Switching Matrices
• Automated Test Software (Python, LabVIEW, or equivalent)

Preferred

• Comfortable operating in cleanroom, laboratory, and factory environments.
• Proven ability to troubleshoot and close hardware issues under aggressive timelines.
• Direct LEO satellite RF or TT&C integration experience.
• Launch base or on-orbit support exposure.
• Experience supporting multiple flight vehicles in parallel.
• Background developing automated RF test frameworks and data systems.
• Standard AIT data logging and configuration management tools

Technology Stack

• Vector Network Analyzers (VNA)
• Spectrum Analyzers

Physical Requirements

Ability to work extended periods in cleanroom and lab environments.

Frequent hands-on bench work requiring fine motor skills.

Ability to lift and maneuver test equipment and RF racks (up to 40 lbs).

Willingness to travel to launch sites as required.

AST SpaceMobile is an Equal Opportunity, at will Employer; employment is governed on the basis of merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.