Dorothy Bradley was born in Madison, Wisconsin, in 1947. She holds a law degree and has a background in public service, including roles in the state water court and as a teacher near the Northern Cheyenne Indian Reservation. Bradley has extensive experience in public administration, having served in the Montana House of Representatives and as the Director of the Montana State University Water Center. She also contributed to criminal justice reform as part of the Gallatin County Criminal Justice Coordinating Council for seven years.

Dorothy Bradley's career reflects a deeply rooted commitment to environmental stewardship and regional development. Her extensive work with water resources, from the state water court to the Montana State University Water Center, indicates a strategic focus on sustainable practices. Notably, Bradley's involvement with the American Prairie Foundation suggests a nuanced approach to balancing conservation with economic growth. Her background also hints at a localized, community-driven philosophy, evident in her teaching experience and administrative roles within rural settings. This juxtaposition of environmental advocacy with practical, on-the-ground experience presents an intriguing tension in her political identity.