The United States Holocaust Memorial Museum (USHMM) requires contractor services to provide quarterly preventive maintenance, emergency service, and repairs for retractable security bollards, active v... The United States Holocaust Memorial Museum (USHMM) requires contractor services to provide quarterly preventive maintenance, emergency service, and repairs for retractable security bollards, active vehicle barriers, and security gates located across two facilities: the USHMM main facility in Washington, DC, and the Shapell Collections, Conservation and Research Center (SCCRC) in Bowie, MD.