For over 34 years, Mary Nan Dupont has been practicing law in the area of estate planning and trust and estate administration.
After a one-year clerkship with Judge John R. Gibson, a federal court of appeals judge, she began her legal career at Spencer Fane Britt & Browne, achieving partnership status.
Mary Nan opened Dupont Law Firm in 2002 and practiced as a sole practitioner for over 12 years.
Mary Nan joined the law firm of Sage Law, LLP in 2017.
She is licensed in both Kansas and Missouri.
She achieved an A-V rating through the national peer-review ranking system with Martindale-Hubbell, which is the highest ranking given to attorneys.
General Information and Civic Involvement
Born and raised: Chillicothe, Missouri
Married to Michael Thiessen and mother of three children
Undergraduate Education: University of Missouri – Columbia (B.S.B.A. in Finance and Economics 1985) Magna Cum Laude
Law degree: University of Missouri – Columbia (J.D. 1988) Cum Laude, Order of the Coif and Law Review
Kansas City Symphony League Member - Previous Ball Treasurer, League Treasurer, and Parliamentarian
Lyric Opera Circle Member - Previous Ball Treasurer and Parliamentarian
Mizzou Letter Winners Board of Directors
Professional Affiliations, Articles and Presentations
Missouri Bar Member - Admitted in 1988
Kansas Bar Member - Admitted in 1989
Children’s Mercy Planned Giving Council Member
Author of 2013 Chapter 4 "Drafting a Marital Deduction Will and a Marital Deduction Trust," Missouri Bar Estate Planning Trusts and Estates Series.
Presentations for local estate planning organizations, businesses, and non-profits on the following topics:
Procedures for Gathering Client Information
Charitable Giving Techniques
Private Foundations vs. Community Foundation Funds
Planning for Disability
Choosing a Fiduciary
The Use of Disclaimers in the Spousal Situation
Joint Trusts - When to Use and When Not to Use
What to do When the Client Dies
Everybody Needs a Plan: Dispelling the Myths of Estate Planning
Business Succession Planning - Survival of the Family Business
Generation Skipping Transfer Tax Issues
Medicaid, Medicare, and Social Security Planning Issues
Handling Unique Assets in Estate Planning
Mary Nan taught an Elder Law class at UMKC as an adjunct professor in 2001.