This unrestricted procurement seeks a single firm for an Indefinite Delivery/Indefinite Quantity (IDIQ) contract to provide Architect-Engineer (A-E) services for encroachment management and mission readiness at Navy and Marine Corps installations, primarily in Navy Region Southwest but potentially worldwide. The contract includes a two-year base period and three one-year options, with a total fee cap of $30,000,000 and a guaranteed minimum of $1,000. Individual task orders will be firm-fixed price, ranging from $25,000 to $2,500,000, with no annual dollar limit. The estimated start date is March 2027. Primary services include land use planning, AICUZ/RAICUZ studies, and encroachment action plans, with secondary services covering related studies and reports.