DynCorp

http://www.dyn-intl.com

DynCorp International LLC has its origins with two companies formed in 1946—Land-Air, Inc., and California Eastern Airways.

Site says:

Law Enforcement & Security

Maintaining security is a global problem, but individual security needs are unique. That is why we deliver flexible, integrated solutions to protect people, facilities and information. Using our vast experience in personal physical security and technology, and a global recruiting capability that is unrivaled in our industry, we work with you to assess risks and apply the right mix of the best people and the most advanced technologies available. We have trained police and provided civilian peacekeeping services on four continents and can provide fully certified U.S. police officers for training or specialized security functions.

-- Raymond Lutz - 14 Aug 2007