Mari Tomunen is an associate in Goodwin’s Technology group, where she advises blockchain technology and digital asset companies with various legal and regulatory issues. In addition, Ms. Tomunen is an Adjunct Professor at Boston College Law School where she teaches a course called Blockchain, Cryptocurrencies and Digital Assets.

Areas of Practice
Domaines D’Expertise





Ms. Tomunen has advised several dozens of blockchain and digital asset businesses of various sizes as well as governments with legal and regulatory issues most commonly related to securities, commodities, banking, and corporate law. She possesses unique expertise in the regulatory classification and analysis of digital assets and compliant digital asset offerings, including offerings involving equity tokens, investment contracts, and non-security (“utility”) tokens. She bases her legal advice on profound knowledge of the functionality and economics of cryptocurrencies, token offerings, smart contracts, Central Bank Digital Currencies, stablecoins, non-fungible tokens, airdrops, as well as centralized and decentralized cryptocurrency exchanges, and other digital asset trading platforms. She holds a deep understanding of different distributed ledger technologies including blockchains and their validation and consensus mechanisms as well as directed acyclic graphs.
Professional Experience

Prior to joining Goodwin, Ms. Tomunen was an associate in a Chambers-ranked Fintech group of a law firm in New York and served as a judicial intern to the Honorable Denny Chin of the U.S. Court of Appeals for the Second Circuit, NY. She has also worked as an international corporate tax lawyer at KPMG Oy Ab, Finland, and as a research assistant to former SEC Commissioner Robert J. Jackson, Jr. when he was a Professor at Columbia Law School, NY.

Ms. Tomunen graduated from Fordham University School of Law with magna cum laude, and served as a staff member on Fordham Journal of Corporate and Financial Law.

Professional Activities

Ms. Tomunen is a member of the American Bar Association, New York State Bar Association and Boston Bar Association.

Ms. Tomunen’s recent speaking engagements include:

  • Speaker, The Road to Digital Currency, Boston Blockchain Week 2022 (September 21, 2022)
  • Speaker, Six Visions for a World without Cash with Aleksi Grym from Bank of Finland, Big Sister Investment Club (September 15, 2022)
  • Speaker, Crypto Camp, Big Sister Investment Club (September 26, 2021)
  • Speaker, Blockchain and Cryptocurrencies – What the Coin is Going On?, Licensing Executives Society Scandinavia (September 21, 2021)
  • Speaker, Sustainability, Growth and a Long Drink, Finnish and American Women's Network (FAWN) (May 3, 2021)



Ms. Tomunen was recognized as an “Excellent Associate” by the Legal 500 U.S. Fintech in 2019 and 2020.

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LLM, Banking, Corporate, and Finance Law, 2017
Fordham University School of Law
(magna cum laude)
M.A. (Law), 2014
University of Helsinki, Faculty of Law
(high honors)



New York
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