About Us

Established in 1954, Spalding DeDecker Associates, Inc. (SDA) is an employee-owned civil engineering firm specializing in infrastructure, land development and surveying, with offices in Brighton, Detroit, Rochester Hills and Trenton, Michigan. SDA offers a full range of design and engineering services for municipal, land development, transportation and water/wastewater projects as well as complete construction engineering and land surveying & mapping services.

Corporate Vision

The Vision of Spalding DeDecker Associates is to be the lighthouse for our clients as we navigate an ever-changing world together.

Guiding Principles

Spalding DeDecker Associates will provide thoughtful design and engineering solutions in a value-added manner that fosters long term relationships with our clients. We envision a vibrant work environment that advances individual growth in knowledge and experience. To ensure success, the SDA team will use the following guiding principles:

  • Deliver high quality products and services
  • Be fiscally responsible
  • Listen, understand and communicate clients’ needs
  • Be on the leading-edge of technological advancement
  • Empower our people to share ownership and provide opportunities to grow
  • Share our time and expertise within our communities
  • Deliver best-in-class customer service