Diana R. Gardner has lived in Ann Arbor nearly all her life, graduating from Pioneer High School, University of Michigan (B.A. History) and the University of Detroit School of Law. Diana began practicing law in 1982, focusing on estate planning and trust and estate administration. She has also worked as a Trust Officer at what is now Key Bank, and at Ann Arbor Commerce Bank. After taking some time off to raise their sons, Diana joined her husband at Gardner & Associates, P.C. in 2008.

Diana is a Member of the State Bar of Michigan, Estate and Probate Section, the Washtenaw County Bar Association and the Washtenaw Estate Planning Council. She is the former Co-Chair of the Washtenaw County Bar Association, Estate Planning, Probate and Trust Law Section.