1360 E Locust St,, Ontario, California, 91761, United States
Established July 1998
SDI is a family-owned company operating under the most important motto: Quality is Job # 1. SDI was started by Michael James Patrick Shannon in 1990 from his home garage. From then on, our company moved from a small garage business to a successful large company that employs more than 65 people. Houses in the center of 35,000 sqft
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