Dettman-Bielefeldt spent 17 years in shopping center management and marketing earning a national "Maxi" award for shopping center marketing and being a featured author in several shopping center publications. She received accreditation as a shopping center manager (CSM) and shopping center marketing director (CMD) through the International Council of Shopping Centers.
In 1996, Dettman-Bielefeldt left the shopping center industry to become a commercial real estate broker. She quickly found success, and formed DB Commercial Real Estate just three years later. She has sold dozens of businesses and commercial buildings utilizing experience gained in the shopping center and commercial real estate industries. Successful sales include restaurants, hair salons, golf courses, a book store, bars, cleaning companies, small manufacturing companies, dry cleaners, mini warehouses, large warehouses, franchises, day care centers, and supper clubs. Other sales include apartments, commercial buildings, and vacant land. In addition, Dettman-Bielefeldt leases commercial properties in Northeastern Wisconsin and is the exclusive leasing agent for a number of strip shopping center developers.
She is also a volunteer for SCORE, a non-profit group funded by the SBA, that counsels and assists entrepreneurs. Currently serving as Assistant District Director for Wisconsin, she writes a weekly column in the Green Bay Press Gazette business section.
Bielefeldt has been in the commercial real estate field for more than 30 years having invested in prime parcels of property. His grandfather, Oscar Bielefeldt, founded THE WHITE STORE, a chain of department stores located in the Green Bay market. Bielefeldt followed in his grandfather and father's footsteps and spent about 25 years in the family business working his way up to president of the company. After deciding to close the stores, he turned his part-time dalliance in commercial real estate into a full-time occupation as an owner and real estate broker.
Since founding DB Commercial, Bielefeldt has been active in business and commercial sales and leasing. The company has closed on apartment buildings, golf courses, warehouses, mini storage, vacant land, and a wide assortment of businesses. In addition, he has leased space in numerous properties throughout the Green Bay market utilizing the experience gained in leasing his own strip shopping center properties.