Philip S. Olsen

Of Counsel
Philip Olsen

Mr. Olsen is Of Counsel at Morrison & Foerster LLP's Boston office. His practice focuses on state and local tax consulting and litigation. He has more than 25 years of experience litigating or resolving major tax controversies before administrative boards, superior courts, bankruptcy court, state appeals courts and state supreme courts. He has represented municipalities and property owners in property tax appeals, and also has experience in unclaimed property consulting and audit defense.

He was previously a senior trial attorney and litigation supervisor for the Massachusetts Department of Revenue before the Appellate Tax Board, the Superior court, the U.S. Bankruptcy Court, the Appeals Court and Supreme Judicial Court. He is a frequent public speaker on state and local tax and litigation issues and has addressed organizations such as the Council on State Taxation, Tax Executives Institute, Institute for Professionals in Taxation, Massachusetts Bar Association, Boston Bar Association, Massachusetts Continuing Legal Education and the Massachusetts Society of Certified Public Accountants. He has been recognized in The Best Lawyers in America® for Tax Law (2017), as a “Leader in their Field” in Chambers USA (2010), and as a “Massachusetts Super Lawyer” for tax law. He is past Co-Chair of the Boston Bar Association's State and Local Tax Committee and Tax Controversies Committee, and past Chair of the Massachusetts Bar Association's State and Local Tax Committee.

He holds a Juris Doctor from Suffolk University Law School and a Bachelor of Arts in Political Science from Stonehill College. He is a member of the Massachusetts state bar.

J.D., Suffolk University
B.A., Stonehill College

Bloomberg BNA State Navigators:
Massachusetts Corporate Income Tax
Massachusetts Pass-Through Entity Navigator