The Department of Energy is seeking capability statements for a potential 10-year contract to provide technical research, engineering, and development support for national security and environmental programs. Work will be performed at the Nevada National Security Site, the Nevada Test and Training Range, and over 24 monitoring locations across Nevada, Utah, and California. Interested parties must demonstrate capabilities in areas including security clearance compliance, multi-state field operations, hydrologic modeling, community environmental monitoring, cultural resources, and defense nuclear nonproliferation diagnostics. Responses are due by July 23 at 11:00 AM Mountain Time, and no budget amount has been specified. This is a sources sought notice for market research only, not a solicitation for a contract.