SDI is a family-owned company that operates under a very important motto: Quality is Job #1. SDI was started by Michael James Patrick Shannon in 1990 out of his own home garage. Since then, our company has evolved from a small home-garage business to a successful large-scale company employing over 65 people. Housed in a 35,000 sqft facility, SDI operates the largest fleet of service vehicles on the west coast. Our magnificent growth and success has much been owed to an unmatched expertise of our field, an unrivaled work ethic, a sharp focus on details, and the highest level of customer service. It is this level of quality that allows us to stand head and shoulders above competition.

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