Ryan Tivnan


Ryan Tivnan represents individuals, estates, and businesses before the Internal Revenue Service (IRS) and Massachusetts Department of Revenue. He received his Master of Laws degree in Taxation from the Boston University School of Law and served as a legal intern for the Honorable Angela M. Ordoñez, Chief Justice of the Probate & Family Court of Massachusetts.


Ryan counsels clients with federal and state tax controversies, including:

  • Audits and examination, including calculation of correct tax liability, and minimizing penalties and interest
  • Submissions of Offers in Compromise, Installment Agreements, and Innocent Spouse Relief to the IRS for settlement of tax liabilities
  • Extensive experience assisting individuals and corporations with foreign bank accounts, FBAR, and Form 8938 reporting requirements in over 40 countries, including submissions to the Offshore Voluntary Disclosure Program, Streamlined Domestic and Foreign Procedures, and the additional disclosure programs
  • Foreign bank account analysis, currency conversions, stock valuation, foreign tax credits and transactions, and calculations of capital gains and losses of assets, including cryptocurrency and PFICs
  • Submissions of voluntary disclosures to the IRS to assist taxpayers with bringing their tax accounts into compliance

Previous Experience

Boston University School of Law (2016-2017)
  • Teaching Assistant in Graduate Tax Program’s Practice and Procedures Course
Norfolk County Probate and Family Courthouse (2012)
  • Legal Intern
  • Researched and drafted motions and memoranda
  • Analyzed estate assets
Adecco (Entegee) (2007-2010)
  • National Account Manager/Sales Representative
  • Developed new corporate accounts and managed existing client relationships for engineering staffing company, including negotiating contracts, managing staffing needs, and training new employees

Community Involvement

Hanover Youth Athletic Association

Served as President of Hanover Babe Ruth Baseball, Umpire Commissioner, Player/Coach Sr. Babe Ruth Baseball League, Umpire, Little League and All Star Coach, Friends of Hanover High Hockey.

Main: 617.600.5400

Fax: 617.284.6260

Email: ryan@mcmahontaxlaw.com


Boston University School of Law

  • LL.M. in Taxation

Suffolk University Law School

  • J.D.

University of New Hampshire

  • B.A. Political Science,
    Minor in English

Bar Admissions


Court Admissions

  • U.S. District Court for the District of Massachusetts
  • U.S. Tax Court