Aerojet Rocketdyne is an American rocket and missile propulsion manufacturer.
Aerojet manufactures rocket motor, and is providing propulsion and energetics to the space, missile defense, strategic, tactical missile and armaments areas in support of domestic and international markets.
Headquartered in Sacramento, California, the company is owned by GenCorp. Aerojet Rocketdyne was formed in 2013 when Aerojet and Pratt & Whitney Rocketdyne were merged, following the latter's acquisition by GenCorp from Pratt & Whitney.