The District of Columbia (“District”) Department of General Services (the “Department” or “DGS”) 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 Aiton Elementary School (“Aiton ES”), which is located at 533 48th Place NE, Washington, DC (“Project”).