Riesberg served in the Colorado General Assembly, where he was first elected in 2004 to represent House District 50 (Greeley, Garden City and Evans). At the time of his appointment as Commissioner, he was the ranking member of the House Health and Environment Committee and a member of the House Appropriations Committee.
Riesberg is a Colorado native who has lived in Greeley for 30 years. He worked for 24 years at various insurance and human resource companies, including Allstate Insurance Company. He spent 16 years in leadership roles with nonprofit organizations specializing in aging, hunger and housing issues. He also taught junior high school for five years.
Riesberg earned a bachelor’s degree in history and a master’s degree in gerontology, both from the University of Northern Colorado. He completed the Graduate Realtor’s Institute and holds numerous certificates and awards for courses in insurance, real estate, sales training and personal development.