The Department of the Navy is conducting market research for potential technical and engineering services to support advanced studies, sustainment, and Lifetime Support for the AEGIS Combat System for international partners. This is a sources sought notice for planning only and is not a Request for Proposal. Responses are due by the closing date and time on Friday, 13 February 2026, and must be submitted via email to the specified contacts with a white paper not exceeding 10 pages. The work involves sustainment and lifetime support for the AEGIS Combat System, requiring significant expertise and a facility capable of handling classified material. Respondents must provide the expected address(es) where production and test work would be performed.