Bob and John complete their purchase of the firm from Jack, and Jack retires.

Bob Sanderson begins working for Jack Mueller and Jim O'Brien at Sage Engineers and Land Planners as a rear chainman on a survey crew. [cool-timeline layout="horizontal" show-posts="4" date-format="Y" icons="NO" order="ASC" story-content="short"]

Jack Mueller starts Mueller Engineering in a converted garage on Grand Avenue. Bob works for Jack during vacations from college. [cool-timeline layout="horizontal" show-posts="4" date-format="Y" icons="NO" order="ASC" story-content="short"]

Jack calls Bob in Seattle, and Bob returns to work for the growing firm after a stint with the Department of the Navy. [cool-timeline layout="horizontal" show-posts="4" date-format="Y" icons="NO" order="ASC" story-content="short"]

Engineering, Inc. is incorporated and the firm continues to grow at its new location in the Plaza Office Building at 1629 Avenue D in Billings. [cool-timeline layout="horizontal" show-posts="4" date-format="Y" icons="NO" order="ASC" story-content="short"]