This is a sources sought notice for market research, not a solicitation, for an IDIQ Multiple Award Construction Contract (MACC) for design-build and design-bid-build projects within the NAVFAC Washington Area of Operation (DC, Virginia, Maryland), primarily in Indian Head, MD. The work includes new construction, demolition, abatement, repair, alteration, and renovation across operational, industrial, logistics, and energetics/research facilities, requiring specialized explosives safety and UXO experience. The total estimated construction cost for all contracts is not-to-exceed $499,000,000, with individual projects ranging from approximately $350,000 to $50,000,000, and an aggregate bonding capacity of $50,000,000 is required. The period of performance includes a 24-month base ordering period and two 36-month option periods. Interested firms must submit a capabilities package demonstrating relevant experience as prime contractor on similar energetics projects, including safety metrics.