From Hopper & Dennis to Hopper Dennis Jellison, and now HDJ Design Group, we continue to build and enhance relationships with our clients. For 29 years, our focus on quality, service, and dedication to our clients has remained constant. HDJ Design Group is a complete service civil engineering company located in the Pacific Northwest.

Contact Details

  City Pasco , WA
  Zip Code 99301
  Address 6115 Burden Boulevard
  Phone Number (509) 547-5119