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Landmark Security Inc is a Charlotte, NC-based company in the Business Services sector.
MADISON SECURITY GROUP is a Lowell, MA-based company in the Business Services sector.
Donohue-Halverson Inc is a Ithaca, NY-based company in the Business Services sector.
Lifeshield is a Wayne, PA-based company in the Business Services sector.
G4S is the leading global, integrated security company, specialising 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 our markets. G4S is quoted on the London Stock Exchange and has a secondary stock exchange listing in Copenhagen. G4S is active in around 90 countries and has over 540,000 employees. For more information on G4S, visit www.g4s.com. G4S works to safeguard the welfare and prosperity of millions of people worldwide – helping to create safer and better environments in which people live and work.