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John J. Leahy, Jr.


576 St. James Ave

Springfield, MA 01109


413-788-4000 ext 1


B.S.B.A Accounting, American International College, 1984
J.D., cum laude, Western New England University School of Law, 1998


Bar Admissions

U.S. District Court for the District of Massachusetts

Attorney John J. Leahy, Jr., focuses his practice on IRS Representation, in civil and criminal matters, Personal Injury, Estate Planning, Real Estate Law and Probate.  He works closely with his clients providing guidance and advice throughout his representation.      

John spent over 30 years as a Criminal Investigator with the United States Internal Revenue Service, including 6 years as the IRS Criminal Investigation Attaché at the United States Consulate in Frankfurt, Germany.  While with the IRS, he conducted and supervised complex financial investigations involving criminal tax, money laundering and Bank Secrecy violations.   He is a member of the Massachusetts Bar Association Taxation Law Section Council.

Attorney Leahy has acted as an adjunct professor at Western New England University where he has taught undergraduates and graduate students in Introduction to Criminal Justice, Constitutional Issues in Criminal Justice and Tax Research and Writing.


Mr. Leahy has lectured in over 15 countries and domestically to law enforcement officials, prosecutors and judges on Financial Investigative Techniques, Money Laundering, Identity Theft, Tax Fraud, Terrorist Financing and various IRS programs including the Requirements for Reporting Foreign Bank and Financial Accounts (FBARs), the Offshore Voluntary Disclosure Initiative and the IRS Whistleblower Program.      



IRS Criminal Investigation Chief’s Investigative Excellence Award – September 2016





Hampden County Bar Association


Former Member of the Massachusetts Bar Association Taxation Law Section Council


Association of Former Internal Revenue Service Special Agents


IRS Criminal Investigation Representative: The Financial Action Task Force (FATF), Paris France, 2009 -2011.


Member of the FATF Working Group 8, Criminal Tax Investigations, 2009-2011.


MONEYVAL - Council of Europe Committee of Experts on the Evaluation of Anti-Money Laundering Measures and the Financing of Terrorism, Strasbourg, France, 2009-2011.

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