Joseph began building lunar spacecraft in 2016 under JPL supervision while at university, where he owned the Telemetry, Tracking & Command (TT&C) subsystem for a CubeSat mission to study the efficacy of lunar regolith as radiation shielding. After graduating, he joined Collins Aerospace and owned SATCOM specifications and qualification test campaigns for military helicopter avionics while holding a Secret clearance. At Blue Origin, he started in Advanced Development Programs, where he supported C&DH testing for Blue Ring and then BE-4 environmental qualification. When the company won NASA's Human Landing System contract, he moved to the Lunar Permanence business unit as Responsible Engineer for avionics hardware-in-the-loop test assets at Johnson Space Center.
Before Semaphore, Joseph served as a rotating Flight Director at Amazon Leo while the constellation scaled from two protoflight satellites to hundreds of production satellites. In that role, he directed distributed flight control teams and kept the satellites in safe custody from pre-launch checks through demise. Alongside that work, he conceived and then built Amazon Leo's mission operations data and analytics platform. He holds a BS in Software Engineering from Auburn University.