Engineers, Architects
150 Tower Road
Suite 100
Dakota Dunes, SD 57049
(605) 910-7097
Exit 1 off I29 then west on Two Rivers Drive/Dakota Dunes Blvd. Turn north at the stoplight on to Sioux Point Rd, then right onto Tower Road.
Office hours M-F 8 am to 5 pm
who to contact
Laura Drager
Marketing Manager
Kaitlyn Freemark
Events Manager


Engineers | Architects
about us
ISG is a full-service architecture, environmental, engineering, and planning firm that is 100% employee owned with a rich history, which extends over 50 years of building trusting relationships.