This opportunity is a sources sought notice restricted to SeaPort NxG MAC holders only, covering logistics and technical support in-house engineering services for submarine sonar, combat systems, and training systems. Most work will be performed within the local commuting area of NUWC Division Keyport, with some services at fleet locations throughout the United States. The contemplated task order would be Cost-Plus-Fixed-Fee under the SeaPort-NxG IDIQ contract, with a 12-month base period and up to four option years, and the solicitation is anticipated in Q2 FY27. The estimated level of effort is approximately 152 FTEs per year, with each FTE equaling 2,000 hours. This notice is for planning and market research purposes only, not a solicitation, and no reimbursement will be provided for responses.