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Service Experience
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  • State & Local Tax

Matthew DiDonato




Executive summary


Matthew is the New York City managing principal for Grant Thornton. He is a tax partner and leads the Northeast territory state and local tax practice. Matthew has more than 20 years of public accounting, private industry and legal state and local tax experience.


Matthew's skills encompass the full range of state and local taxation, including income, franchise and sales/use taxation research and planning for diverse business organizations and transactions. He has worked with various types of business entities, including corporate, partnership, and trust entities, engaged in a variety of industries such as technology and telecommunications, retail and consumer products, life sciences, media and entertainment, finance, banking, insurance and broker/dealer.


He negotiates and resolves state tax disputes, facilitates requests for advisory opinions, opinions of counsel, voluntary disclosures and audit defense. Matthew is a resident of New Jersey and was the previously Grant Thornton's New Jersey Office Managing Partner.


Prior to joining Grant Thornton, Matthew was at Ernst and Young LLP's Financial Services Organization State and Local Tax Practice. He was previously Tax Transactions and Consulting Counsel at Mayer Brown, LLP. During this time, he served a full spectrum of clients on matters related to business transactions and multistate tax matters.


Matthew served as Vice President and Tax Counsel at the tax department of a prominent investment bank, where he was responsible for managing the tax implications arising from newly developed business lines and acquired businesses including companies within the power and energy industry. Previously, Matthew was a senior manager at another - Big Four's accounting firm focusing on multistate tax matters.




Professional qualifications and memberships

  • Certified Public Accountant, licensed in New Mexico, New York State
  • Member, Connecticut, New York, Washington, D.C. state bar associations
  • Member, American Institute of Certified Public Accountants


Presentations and Publications

  • Council on State Taxation 
  • Tax Executive Institute 
  • New York State Society of Certified Public Accountants



  • LLM, Georgetown University Law Center
  • JD, Saint John’s University School of Law
  • BA, Pace University, Lubin School of Business

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