The first US Hall thruster flown in space, Busek's BHT-200, was launched aboard the Air Force Research Laboratory's (AFRL) TacSat-2 satellite.

[3][4] Aerojet, under license with Busek,[5][6] manufactured the 4 kW Hall thruster (the BPT-4000) which was flown aboard the USAF AEHF communications spacecraft.

In 2023, Busek announced the successful on-orbit commissioning of its BHT-350 Hall-effect thrusters on 80 OneWeb satellites, launched in December 2022 and January 2023 on SpaceX Falcon 9 rockets.

[20] As of July 2012[update], Busek was working on a DARPA-funded program called DARPA Phoenix, which aimed to recycle some parts of on-orbit spacecraft.

[21] In September 2013, NASA awarded an 18‑month Phase I contract to Busek to develop an experimental concept called a High Aspect Ratio Porous Surface (HARPS) microthruster system for use in tiny CubeSat spacecraft.