In addition to satellite launches, the contract also includes launch vehicle production as well as integration, as well as launch operations and related feasibility activities.
"SpaceX is honored that Air Force chose Falcon Heavy to launch the AFSPC-52 mission given in a competitive way," said SpaceX President and Chief Operating Officer Gwynne Shotwell.
"SpaceX will gladly continue to offer American taxpayers the most cost-effective and reliable launch service for space missions crucial to national security," he continued.
SpaceX is reportedly beating bids from other companies, but US Air Force does not elaborate on the competing companies or offers.
The project will run at SpaceX headquarters at Kennedy Space Center, Florida and in McGregor, Texas. The project is expected to be completed by 2020. As for the launch it is planned to take place at Kennedy Space Center.
The USAF's satellite will be launched using SpaceX's Falcon Heavy which has also been awarded USAF. This certification was obtained after the new Falcon Heavy completed a launch.