The parent organization of Delich Roth & Goodwillie, P.A. Engineers (DRG) was initiated in 1931 when Truman Schlup and his associates began providing engineering and surveying services in Wyandotte County and to the Kansas Department of Transportation. As new owners were added, the name was changed to Schlup, Becker and Brennan and finally to Delich Roth & Goodwillie in 1992. DRG and its predecessors have been based in the Kansas City area for over 75 years.

DRG currently employs 35 engineers, technicians and operations staff at two locations in the Kansas City area.