Joe Duncan II, PE

Senior Principal Engineer

Joe is the Mankato Civil Work Group Leader and a principal engineer who assists his clients to achieve their goals and vision. He began his career in 1992 and has experience in the planning, design, and administration of civil and municipal engineering projects. Joe uses his experience with city infrastructure reconstruction projects, municipal state aid and state cooperative agreement projects, residential and commercial developments, storm sewer and detention basin design, and construction administration to serve a variety of clients. “Bolton & Menk has been a tremendous company to work for, offering significant opportunities and allowing me to stretch the boundaries of my own capabilities as a person, engineer, and manager.” When not managing projects, Joe is managing the family’s sports and activity calendar of his three children. Skiing, snowmobiling, and camping top the list during family free time.


  • South Dakota State University

Named one of the very best workplaces in the State of Minnesota! We’re proud to rank in the Top 50 on the list, and even prouder that we were voted in by our own employees.