Philip Olsen focuses his practice on state and local tax consulting and litigation. Philip has more than 20 years of experience litigating or resolving major tax controversies before administrative boards, superior courts, bankruptcy court, state appeals courts, and state supreme courts. Philip has represented municipalities and property owners in property tax appeals, and also has experience in unclaimed property consulting and audit defense.

Prior to joining Pierce Atwood, Philip was a partner at Burns & Levinson LLP, and before that, a partner with McCarter English. He was also 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.

A frequent public speaker on state and local tax and litigation issues, Philip 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.

Honors & Distinctions

  • Recognized in The Best Lawyers in America® for Tax Law (2017) 
  • Recognized as a "Leader in their Field" in Chambers USA (2010)
  • Named a "Massachusetts Super Lawyer" for tax law (2004)

Professional Activities

Boston Bar Association State and Local Tax Committee, member and past Co-chair

Boston Bar Association Tax Controversies Committee, past Chair

Massachusetts Bar Association State and Local Tax Committee, member and past Chair


"The Continuing Question of Domicile," Boston Business Journal, June 28, 2013