The Benchmark of Excellence

Established in 1954, Spalding DeDecker Associates, Inc. (SDA) is an employee-owned engineering consulting firm specializing in infrastructure, land development, and surveying.  With offices in Detroit, Plymouth, and Rochester Hills, and field offices in Cleveland, Monroe, and Trenton, SDA offers a diverse core of engineering and surveying services for municipal, land development, transportation, and water/wastewater projects.  The firm also offers complete construction engineering and landscape architectural services.

Core Purpose

Creating Infrastructure Solutions for Our Life & Planet

Guiding Principles

As an Owner of Spalding DeDecker Associates, Inc., ownership requires full engagement in my job mentally, emotionally, spiritually, and physically; otherwise I am just an employee.  My positive “can do” attitude must exhibit the honesty and integrity of SDA’s foundation.