Mary N. Peterson is Of Counsel with the firm of Rath, Young and Pignatelli, P.C.  Mary’s practice focuses on state and local tax, regulated industries, administrative practice and public policy.

Mary has extensive experience in state and local tax matters, as well as in utility regulation, commercial contracts, lender liability, bankruptcy, securities, person injury and civil rights. Mary has previously been engaged on key public policy issues, ranging from economic development and affordable housing to energy and clean water.

Prior to joining the firm, Mary was the Commissioner of the Vermont Department of Taxes (2011-2016), where she was charged with administering all major taxes for the state of Vermont. In this role, she advised the Governor, other state agencies and the legislature on matters related to finance. Key accomplishments included successful passage of important tax initiatives each year including reform of estate and renewable energy taxes and the resolution of tax treatment for new economy business models, including cloud services and private lodging rental platforms.

Prior to her Tax Commissioner role, Mary served three terms in the Vermont House on the Ways and Means Committee.  In this role, she was involved in the passage of key legislation, including Vermont’s shift to combined unitary taxation.  Mary has served in various local government roles, including planning boards. Mary was Chair of the Selectboard for the town of Williston and on the Board of Directors of the Vermont League of Cities and Towns.  Mary previously  has practiced with Spink & Miller in Burlington, VT and Sullivan & Worcester in Boston, MA.


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More About
Education and Bar Admissions


  • Northeastern University School of Law, J.D.
  • St. Lawrence University, summa cum laude, B.A.

Bar Admissions:

  • Vermont
  • Massachusetts (inactive)
Community Involvement


  • House of Representatives, Ways & Means Committee, Town of Wiliston, VT (2003-2008)
  • Williston Select board, Planning and Conservation Commissions (1996-2004)
  • Vermont League of Cities and Towns, Board of Directors