The Department of Defense, specifically the Space Systems Command (SSC) Military Communications & Positioning, Navigation and Timing (CGK) Division, intends to issue a sole source contract modification to Lockheed Martin Corporation for the continued performance of risk reduction and early design for the Mobile User Objective System (MUOS) Service Life Extension Phase I. This contract modification will extend performance for six months, from August 2, 2025, to February 1, 2026, with the option for six additional one-month extensions through August 1, 2026, to accommodate any unforeseen delays. The services are critical for ensuring the ongoing functionality and reliability of military communications systems, and the government has determined that competition would lead to significant costs and delays. Interested parties must submit their rationale for consideration by 1:00 PM PDT on April 14, 2025, to the designated contacts, Sandy Roche and Patrick Heppard, via the provided email addresses.