"You may not know much about G4S, but they almost certainly know something about you. The world's largest security firm, operating in over 125 countries and employing over 650,000 staff worldwide, are believed to be the second largest private employer worldwide, behind only Walmart. Globally they are responsible for security at over 150 airports, countless private companies, they do police work in the UK and are the main security firm for the 2012 London Olympics – so they make it their business to know who you are.
Known for their ruthless competitiveness, the British-Danish firm have recently been seeking to expand outside of their traditional base in Europe and the US. The Middle East is one of their main targets, with operations in the region worth $410 million and with just shy of 50,000 employees."