- Type: Commercial
- Abbreviation: NGSS
- Administration: CEO: Kathy Warden
- Founded: 2015
- Launchers: Antares | Minotaur | Pegasus
- Spacecraft: Cygnus
- Country: USA
Northrup Grumman Space Systems designs, builds and delivers space, defence and aviation-related systems to customers around the world. They aquired Orbital ATK in 2018 along with its launchers and ongoing missions.