***ONLY SEAPORT MAC HOLDERS ARE ELIGIBLE FOR AWARD UNDER THIS SOLICITATION.*** Request for Proposal (RFP) (N6133126R3108) under the Seaport NxG Multiple Award Contract (MAC), for ACV Crew, SEAOPS Program, FMS Program and Future Connectors Program Support. This effort has been previously posted within the Solicitation Module via PIEE under the following: Sources Sought Notice (N6133126SNQ25), dated 17 April 2026 and follow-up Advance Planning Notice/Pre-Solicitation Notice dated 11 May 2026. ***RESPONSES MUST BE SUBMITTED VIA THE PIEE SOLICITATION MODULE.*** ***ALL DOCUMENTS ARE AVAILABLE WITHIN PIEE ONCE REQUESTED, VETTED, AND APPROVED*** ***QUESTIONS AND ANSWERS WILL TAKE PLACE VIA EMAIL TO THE PRIMARY AND SECONDARY POINTS OF CONTACTS IN THIS NOTICE. QUESTIONS AND ANSWERS WILL BE POSTED TO THE PIEE SOLICITATION MODULE ONCE APPROVED IN A TIMELY MANNER.***