This is a sole-source intent to award an IDIQ contract to Peraton for the continued development and sustainment of Theater Mission Planning Center subsystems. The contract will have a base year and four option years, with an estimated start in Quarter 1 of Fiscal Year 2027. The performance of services is tied to the contractor, Peraton, located in Chantilly, Virginia. The justification is that Peraton, as the Original Equipment Manufacturer, is deemed the only source with the necessary proprietary knowledge and technical data to avoid unacceptable delays. While this is not a request for proposals, interested parties may identify their interest and capability to the government for consideration.