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Spartan Security is a Houston, TX-based company in the Business Services sector.
Global Shield Security Inc is a Van Nuys, CA-based company in the Business Services sector.
Technical Options Inc is a Naperville, IL-based company in the Business Services sector.
Red Alarm is a Berkeley, CA-based company in the Business Services sector.
G4S is the leading global, integrated security company, specializing in the provision of security services and solutions to customers. Our mission is to create material, sustainable value for our customers and shareholders by being the supply partner of choice in all of our markets. G4S is quoted on the London Stock Exchange and has a secondary stock exchange listing in Copenhagen. G4S is active in over 110 countries and has 623,000 employees.