This is a solicitation for a single-award IDIQ contract to provide Mission Partner Environment Operations, Maintenance, and Sustainment services. The contract has a minimum order value of $5 million and a maximum ceiling of $5.57 billion. The period of performance includes a five-year base ordering period from December 2024 through December 2029, a five-year option period, and an additional year for task order performance, totaling 11 years. The government is no longer accepting questions for this solicitation. Proposals must be submitted via the PIEE Solicitation Module.