The Department of General Services (DGS) has an immediate need for the aforementioned Contractor to provide On-Call HVAC technician services at Dunbar Senior High School, including the management, supervision, labor, materials, supplies, and equipment to ensure effective performance. Services shall be carried out for a period of no more than 120-days in accordance with Chapter 47 of title 27 of the DCMR Section 4719 and PPRA Sec. 405 (d); Emergency Procurements.