Slay Engineering Company, Inc. was established in San Antonio, Texas in 1982. At the request of a client, we opened a second location in Laredo, Texas in 2005. Over the course of the past 41 years, the company has provided general civil engineering services to such valued clients as the City of San Antonio, City of Balcones Heights, San Isidro Management, Whataburger, Valero Energy Corporation and Kraus Development.