Need an onsite security system you can rely on, one that isn't just a disembodied voice on the phone? Command Security System was established in 2010 to meet the security personnel needs of Los Angeles, San Diego, and Orange Counties. We are a fully licensed security service company that operates within the construction field as well as commercial and residential. We offer security officers and trailer guards, mobile surveillance units, and access control. Whether it's your house, business, or construction site that needs securing, you can count on Command Security System.