Gulfstream Aerospace will continue to support both military aircraft platforms for the U.S. Air Force, Coast Guard, Marine Corps and Navy through Aug. 31, the Defense Department said Thursday.
The modification exercises the fifth option year on a previously awarded contract.
The Air Force Life Cycle Management Center will obligate $38.4 million at the time of award.
C-20 and C-37 are built for airlift and special air missions of high-level government and DoD officials.