DSI Security Services
3281 E Guasti suite 738 | Ontario, CA, 91761Last time updated: 2/26/23, 9:51 AM
About
Security Guard Services and alarm installation
DSI originated in 1969, when Sheriff A.B. Clark started a security company in response to a request from the construction company building the nearby Farley Nuclear Plant. As the company’s reputation grew for providing quality security services, DSI began to grow, and currently has 31 offices in over 19 states. A.B. Clark began DSI with the belief that his company could fill a void with a dependable, competent team of people. DSI now consists of thousands of carefully selected and highly trained security personnel.
Frequently Asked Questions
Which days is DSI Security Services open?
Open on Monday, Tuesday, Wednesday, Thursday, Friday.
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