G4S traces its roots to 1901 when Marius Hogrefe started the manned security company "Kjøbenhavn Frederiksberg Nattevagt" in Scandinavia
In 2002, Group 4 Falck purchased The Wackenhut Corporation, a company founded in Florida in 1954. In 2004, Group 4 Falck A/S merged with Securicor plc to establish a new company named G4S plc. That merger brought together a number of respected security businesses—principally Securicor, Group 4, Falck and Wackenhut. In 2006, the G4S brand identity was rolled out worldwide. Over the next few years, G4S acquired several companies in North America, including:
- Touchcom, a security consultancy, design and systems integrator
- Adesta, a US-based provider of integrated security systems and communication systems
- NSSC, a provider of security consulting with nuclear, chemical and defense technology expertise
In 2010, The Wackenhut Corporation officially changed its name to G4S Secure Solutions (USA) Inc.
Today, with more than 50,000 employees across the United States and Canada, G4S is a leading provider of security solutions. Offering a unique combination of personnel, project management, risk management, and technology solutions, G4S focuses on advancing the safety and security of businesses and governments, ensuring the security of key assets — people, property, products and reputation.