Jan began her insurance career in 1970 when her father, Joseph Bartz, asked her to come into the family business. She obtained her agents license in 1979 and purchased the Bartz Agency from Joe and Sally in 1988. Jan merged the Bartz Agency with The Rumery Agency, Inc. that same year and became a business partner with Phil Siegler.
Jan has lived in the Allegan area all of her life and has been involved in civic life as a member of the City of Allegan Board of Review, Planning Commission and Parks Commission. Jan has also served on the Allegan General Hospital Service League, the Allegan County Community Foundation and is presently a committee member of Wings of Hope, Hospice of Allegan.