The work for this project includes, but is not limited to, the construction of a secure Phase 2 space within the existing J-301 Consolidated Headquarters project at Naval Support Activity (NAVSUPPACT) Marine Corps Base (MCB), Guam. The Phase 2 space includes architectural, fire protection, electrical, telecommunications, HVAC and collateral equipment. The magnitude of this project is estimated between $10,000,000 and $25,000,000. THE NORTH AMERICAN INDUSTRY CLASSIFICATION SYSTEM (NAICS) CODE IS 236220 AND AVERAGE ANNUAL RECEIPTS OF $45 MILLION OVER THE PAST THREE YEARS. The contract completion period is anticipated to be 423 calendar days. A sources sought notice (N62742P859) for this procurement was posted on 9 May 2025 on the System for Award Management (SAM) website https://www.sam.gov/, and a market survey was conducted that included an assessment of relevant qualifications and capabilities of potentially qualified firms. As a result of the market research analysis, a determination was made to solicit this procurement on an unrestricted basis inviting full and open competition. The award of the contract will be to a U.S. prime contractor with U.S. subcontractor and supplier firms. All employees working on the project shall be U.S. citizens or U.S. persons (i.e., an individual who has been lawfully admitted for permanent residence as defined in 8 U.S.C. § 1101 (a)(20) or who is a protected individual as defined by Title 8 U.S.C. § 1324b (a)(3)). Contract award will be made to the responsible offeror whose offer, conforming to the solicitation, is determined to be the lowest evaluated price of proposals meeting the acceptability standards for the technical factors. The technical factors are as follows: (1) Experience, (2) Past Performance, and (3) Safety. The Request for Proposal (RFP) will be available on or around 15 April 2026. Printed copies of the RFP will not be issued. The RFP, including the specifications and drawings, will only be released to U.S. Citizens of U.S. Companies that have been vetted as eligible. To determine eligibility for receipt of RFP documents, each interested firm shall complete and submit a (1) Certification of U.S. Company, (2) Certification of U.S. Citizen, and (3) Authorized Use and Non-Disclosure Agreement, Attachments (1-3). All sources, whether prime Offerors or subcontractors at all tiers, must certify that it is a U.S. Company. All individuals of the approved U.S. Companies requiring access to the RFP documents shall complete and submit a Certification of U.S. Citizen, attachment (2), along with proof of U.S. citizenship and a signed Non-Disclosure Agreement, attachment (3). A list of acceptable documents for proof of U.S. citizenship is provided in attachment (2). The RFP, including the specifications and drawings, will be available on the SAM.gov web site. Interested contractors/subcontractors/suppliers must have an active SAM.gov registration to request explicit access to obtain the RFP…