Kohlman began playing for the Fond du Lac Bears while in high school in the 1950s. After military service, Kohlman resumed playing and began a career with the Bears that spanned over 40 years. He was coach and general manager throughout that time. He was also active in the Wisconsin Amateur Hockey Association and USA Hockey, serving in numerous positions. He was instrumental in gaining ice facilities for his hometown. In Fond du Lac and throughout the state, he was known as “Papa Bear” and “Mr. Hockey.”