Northrop Grumman Innovation Systems (NGIS) was a sector (business segment) of Northrop Grumman from 2018 through 2019. It was formed out of Orbital ATK Inc. a company which resulted from the merger of Orbital Sciences Corporation and parts of Alliant Techsystems in 2015. Orbital ATK was purchased by Northrop Grumman in 2018. Northrop Grumman Innovation Systems designed, built, and delivered space, defense, and aviation-related systems to customers around the world both as a prime contractor and as a merchant supplier. It had a workforce of approximately 12,000 employees dedicated to aerospace and defense including about 4,000 engineers and scientists; 7,000 manufacturing and operations specialists; and 1,000 management and administration personnel. With Northrop Grumman's reorganization of its divisions effective 1 January 2020, NGIS was split, with most of the sector merging with other Northrop Grumman businesses into a new Space Systems sector.