The District of Columbia (“District”) Department of General Services (“DGS” or the “Department” ) 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 (“Design-Builder” or “Contractor”) for the modernization of Tubman Elementary School (“Tubman ES”), which is located at 3101 13th Street NW, Washington, DC 20010 (“Project”).