Aerojet Rocketdyne (L3Harris)

Aerojet Rocketdyne (now L3Harris Technologies, Space Propulsion division, following the 2023 acquisition) is a US propulsion company with more than 75 years of heritage manufacturing rocket engines and propulsion systems for launch vehicles, spacecraft, and missile defence applications. The company's portfolio includes the RL10 upper stage engine used on Vulcan Centaur and Atlas V, RS-25 Space Shuttle Main Engines repurposed for NASA's Space Launch System (SLS), solid rocket motors, bipropellant and monopropellant satellite thrusters, electric propulsion systems, and hypersonic propulsion technology. Headquartered in Sacramento, California, Aerojet Rocketdyne's legacy products power US government and commercial launch vehicles including Antares, Delta IV, and Atlas V.