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Eric B. Tennen

Attorney Profile

Top Rated Criminal Defense Attorney in Boston, MA

Swomley & Tennen, LLP
50 Congress St, Suite 600
Boston, MA 02109
Phone: 617-861-8540
Fax: 617-227-8059
Selected to Super Lawyers: 2015 - 2022
Selected to Rising Stars: 2007, 2013 - 2014
Licensed in Massachusetts Since: 2002
Practice Areas: Criminal Defense, Appellate, Administrative Law
Languages Spoken: English, Spanish
Attorney Profile

Eric B. Tennen is a partner at Swomley & Tennen, LLP, located in Boston, Massachusetts, and he provides representation to clients throughout the surrounding areas. He focuses his practice on criminal defense matters at both the trial and appellate levels, with a special emphasis on sex offenses and their associated collateral consequences, including involuntary civil commitment and sex offender registration.

Mr. Tennen completed his undergraduate education at the University of Michigan, receiving his Bachelor of Arts with distinction in 1998. He went on to attend Boston University School of Law, where he was awarded his Juris Doctor magna cum laude in 2001. Mr. Tennen then continued his legal education at SUNY Buffalo Law School and obtained his LL.M. in criminal law in 2004.

Prior to joining Swomley & Tennen, LLP, in 2004, Mr. Tennen served as a law clerk for a judge on the Massachusetts Appeals Court as well as for the Chief Justice of the High Court of American Samoa. His passionate and thorough advocacy on behalf of his clients since entering private practice has resulted in many victories, including winning a new trial for a client who was convicted in 1985 for the rape of a child due to ineffective assistance of the client's former trial and appellate attorneys.

The chairman of the board of the Criminal Justice Policy Coalition, Mr. Tennen is an active participant in the Massachusetts Association of Criminal Defense Lawyers. He is admitted to practice law in Massachusetts and before the U.S. District Court for the District of Massachusetts, the U.S. Court of Appeals for the 1st Circuit and the Supreme Court of the United States.

Practice Areas
  • 60%Criminal Defense
  • 30%Appellate
  • 10%Administrative Law
Focus Areas

Arrest & Arraignment, Assault & Battery, Criminal Fraud, Criminal Law, Drug & Alcohol Violations, False Accusations, Felony, Juvenile Delinquency, Misdemeanor, Murder, Parole, Probation, Sex Offenses, Tax Evasion, Theft, Criminal Domestic Violence, Appeals


8 Years Super Lawyers
3 Years Rising Stars
  • Super Lawyers: 2015 - 2022
  • Rising Stars: 2007, 2013 - 2014

About Eric B. Tennen

First Admitted: 2002, Massachusetts

Professional Webpage:

Scholarly Lectures/Writings

  • Risky Policies: How Effective Are Restrictions on Sex Offenders in Reducing Reoffending? (2014)
  • Is the Constitution in Harm's Way? Substantive Due Process and Criminal Law - 8 Boalt J. Crim. L. 3 (2004)
  • The Supreme Court’s Influence on the Death Penalty in America: A Hollow Hope? 14 B.U.Pub.Int.L.J. 251 (2005)
  • Boston University School of Law (2006-2010): Legal writing and research for first year law students
  • Boston University Metropolitan College (2011- present): Criminal Procedure for the Criminal Justice master’s program
  • Boston University School of Law (2012): Sex Crimes seminar

Bar/Professional Activity

  • U.S. District Court, Massachusetts, 2003
  • Member, Massachusetts Association of Criminal Defense Lawyers
  • Massachusetts State Bar, 2002
  • U.S. Supreme Court, 2011
  • U.S. Court of Appeals, First Circuit, 2013
  • Member, American Civil Liberties Union (Massachusetts)

Educational Background

  • University of Michigan, B.A. with distinction, 1998
  • University of Buffalo School of Law, LLM in Criminal Law, 2004

Pro bono/Community Service

  • Chairman of the Board of Directors for the Criminal Justice Policy Coalition, 2008


  • Massachusetts Super Lawyer, 2019
  • Massachusetts Super Lawyer, 2018
  • Massachusetts Super Lawyer, 2017
  • Massachusetts Super Lawyer, 2016
  • Massachusetts Super Lawyer, 2015
  • Massachusetts Super Lawyer, 2014
  • Recognized as "Massachusetts Rising Star" as published in Boston Magazine, 2013
  • Paul Liacos Mental Health Advocacy Award by the Committee for Public Counsel Services, 2011
  • Recognized as "Massachusetts Rising Star" as published in Boston Magazine, 2007


  • In Matter of Wayne Chapman; Commonwealth v. Wayne Chapman (Supreme Judicial Court), 2019
  • State Board of Retirement v. O'Hare, 481 Mass. 241 , 2019
  • Doe 76819 v. SORB, 480 Mass 212 , 2018
  • Moe v. Sex Offender Registry Board, 467 Mass. 598 (2014) (Amicus Brief), 2014
  • Doe, No. 68549 vs. Sex Offender Registry, 470 Mass. 102 (2014) (amicus Brief), 2014
  • Doe v. Sex Offender Registry Board, 85 Mass. App. Ct. 482 (2014), 2014
  • L.L., a juvenile vs. Commonwealth, 470 Mass. 169 (2014) (amicus brief), 2014
  • Poe v. Sex Offender Registry Board, 456 Mass 801 (2010) (Amicus Brief), 2010
  • Commonwealth v. Baran, 74 Mass. App. Ct. 256 (2009), 2009
  • Doe v. Chairman of the Parole Board, 454 Mass. 1018 (2009) (Amicus Brief), 2009
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Office Location for Eric B. Tennen

50 Congress St
Suite 600
Boston, MA 02109

Phone: 617-861-8540

Fax: 617-227-8059

Last Updated: 6/24/2022

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