MORE THAN PROTECTING, WE TAKE CARE G4S has taken care of people, companies and institutions for over a hundred years. It is the global leader in security and facilities, with 570 thousand employees operating on six continents. From industry security to airport maintenance, G4S has a broad portfolio of services. Its customized solutions help some of the world's largest companies to maintain more efficient and secure operations. CERTIFICATES OF QUALITY, HEALTH, SAFETY AND ENVIRONMENTAL MANAGEMENT SYSTEMS