The District of Columbia (“District”) Department of General Services (the “Department” or “DGS”), on behalf of the Department of Corrections (“DOC”), is issuing this Request for Proposals (“RFP”) to solicit design-build proposals (“Proposal(s)”) from offerors (“Offeror(s)”) interested in serving as the design-builder (the “Design-Builder” or “Contractor”) for the design and construction of a central boiler plant (the “Project”).