Iridium Wins $85.8 Million U.S. Space Force Contract for EMSS Infrastructure Upgrades

December 16, 2025
Iridium Communications Inc. has been awarded a five-year contract worth up to $85.8 million from the U.S. Space Force to modernize and secure critical satellite service infrastructure supporting the Department of Defense.

Iridium Communications Inc. has been awarded a five-year indefinite delivery/indefinite quantity contract from the U.S. Space Force with a potential value of up to $85.8 million, announced in a press release. The System Infrastructure Transformation and Hybridization (SITH) contract supports upgrades to the Enhanced Mobile Satellite Services (EMSS) Service Center, Technical Support Center, and Defense Ground Station.

The SITH contract enables technology refreshes, lifecycle upgrades, and security improvements for the EMSS network, which provides satellite communications for the Department of Defense. It follows the 2019 Gateway Evolution Contract and is one of three core EMSS agreements between Iridium and the Space Force.

Through its low-Earth orbit satellite network, Iridium delivers global voice and data connectivity for military operations. The company also supports the Space Force’s Proliferated Warfighter Space Architecture by contributing to the ground Operations and Integration segment.

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