The District of Columbia Department of General Services (“Department” or “DGS”), Contracts and Procurement Division, on behalf of the Department of Corrections (DOC), is issuing this Invitation for Bids (“IFB”) to engage a Contractor engage a contractor to provide the roofing and construction services required to remove and replace roof system at Central Detention Facility (CDF), located at 1901 D Street, Washington, DC 20003 (“Work” or “Project”).