Northrop Grumman Corp. said Wednesday that it had combined seven units into five to lower costs.
The Integrated Systems group was combined with Space Technology to form the Aerospace Systems unit, led by Gary Ervin, the Century City company said.
The Information Technology and Mission Systems groups have combined as Information Systems, led by Linda Mills.
Northrop, the only builder of nuclear-powered aircraft carriers for the U.S. Navy, had already streamlined its shipbuilding business by combining its Newport News and Ship Systems units last January.
The aerospace and information groups each have annual sales of about $10 billion, the company said.
Ervin, 51, was president of the Integrated Systems division, and Mills, 59, had led the Information Technology group.
Philip Teel, 60, president of the old Mission Systems group, will retire Jan. 31. Alexis Livanos, 60, who was president of the space unit, will become Northrop's chief technology officer.