Allied Barton Security Service

AlliedBarton Security Services is the biggest American-owned security officer services firm. Set up in 1957, AlliedBarton is a trusted leader with proven expertise in a number of markets, including:AlliedBarton has over 50, 000 employees and 100 offices situated across the US from which we aid protect our more than 3, 300 clients. Several of our clients are very huge enterprises - we serve approximately 200 Fortune 500 firms - and others are smaller organizations. Each client.