Who we are


From humble beginnings in a garage, Sanderson Stewart has grown to become a regional, award-winning, collaborative community development services firm with offices in Billings & Bozeman, Montana; Williston, North Dakota, and Denver, Colorado.

Our Story

Robert Sanderson, fresh from graduate school at Montana State University, joined with long-time Billings area engineer and surveyor, Jack Mueller, to form Engineering, Inc. in 1969. A few years later another Billings native, John Stewart, joined the firm, and the rest as they say is history. Check out our interactive timeline to learn more!