Allied Universal provides security and facility services including guarding, technology-enabled security, event services, and professional support to commercial and public-sector clients. The company traces its roots to Allied Security, founded in 1957, and evolved through the 2016 merger of AlliedBarton and Universal Services of America. It operates under the Allied Universal brand in North America and the G4S brand internationally. The firm’s global leadership is based in Irvine, California, where it established a new corporate headquarters at Market Place Center. Its current business model combines personnel with integrated technology and specialized services to address risk and operational needs across industries such as commercial real estate, healthcare, education, and government. Notable milestones include its expansion to a global footprint through the acquisition of G4S and ongoing development of technology-led offerings.