This is an advance notice for a follow-on Combat Systems Contractor Support Services (CSS) requirement for Team Submarine, covering program management, technical, and logistics support. The estimated level of effort is approximately 1.5 million hours, with a performance period of one base year and four option years. The contract is unrestricted, with a best-value trade-off basis evaluating Technical, Past Performance, and Cost, and includes a 35% Small Business Participation requirement. An Industry Day will be held on June 16, 2026, and only companies with an active SeaPort-NxG Multiple Award Contract may submit a proposal as a prime contractor. No specific budget amount or performance location is mentioned in this notice.