This is a Sources Sought notice for market research, not a solicitation, seeking qualified sources to provide research and development and operation and maintenance support services for the Joint Staff J6 Coalition Interoperability and Assurance Validation Team. The work supports the Deputy Director for Cyber and C5 Integration within the Department of War. The current requirement is performed under a Cost-Plus-Fixed-Fee contract with General Dynamics Information Technology, Inc., with a base year, four option years, and a six-month option. The applicable NAICS code is 541330, and responses are due by 18 June 2026. No budget amount or performance location is specified in the description.