ITT Exelis said the award from the U.S. Army Space and Missile Defense Command and the Army Forces Strategic Command has a one-year base period of performance and six one-year options.
Work will be performed in the United States, Germany, Australia and Japan.
"We are very pleased to be selected to continue our SATCOM services for some of our nation's most important defense and space exploration communications systems," said Ken Hunzeker, president of the Mission Systems division of ITT Exelis.
"Our global workforce has strong experience and significant expertise in mission-critical communications support and related services."
Under the contract -- a cost-plus-fixed-fee arrangement -- ITT Exelis will provide maintenance, life-cycle engineering, on-site technical assistance and equipment installation.
The company will also perform depot-level repair, logistics, cybersecurity services and sustainment.