Kathryn O’Leary Hefferon

The latest addition to our team

About Kathryn O’Leary Hefferon

Kathryn is William O'Leary's daughter and has followed in her father's footsteps as the fourth generation of O'Leary Law. Kathryn was admitted to the Massachusetts Bar on November 20, 2015. She is an alumni of Suffolk University Law School of Boston, Massachusetts where she was an active member of the Suffolk Law National Trial Team. She has also received her Bachelor of Arts in American Government, Concentration in Law & Society from Clark University in Worcester, Massachusetts. She has previously worked at the Bar Counsel of Boston, the Suffolk County District Attorney's Office of Boston, the Essex County District Attorney's Office of Salem. During her undergraduate career she interned at the United Kingdom Parliament House of Commons of London, England as well as interned more locally at the Worcester County District Attorney's Office.


Suffolk University Law School, Boston, MA

Candidate for Juris Doctor, Evening Division 2010-2012, Day Division 2012-January 2014. Honors: Dean’s List (2011-2012). Leadership: Suffolk Law National Trial Team (2012-2013); AAJ Student Trial Advocacy Competition Boston Regional Champions (2013); Suffolk Law 2L Day/3L Evening Trial Competition (2012) Awards: Honorable Mention, Best Oral Advocate, Legal Practice Skills (2011)


Clark University, Worcester, MA

Bachelor of Arts, American Government, Concentration in Law and Society, May 2008. Leadership: American Mock Trial Association Intercollegiate Tournaments 2006 - 2008. Captain, Mock Trial Team, 2007 - 2008. Awards: AMTA Regional Tournament, February ‘07, Outstanding Witness Award; AMTA Regional Tournament, February ‘08, Outstanding Witness Award; AMTA National Tournament, March ‘08. Outstanding Witness Award; AMTA Outstanding Trial Team Trophy – 8th place, Co-Captain. Activities: Clark Bars a cappella group (2005-2008) – by audition




The O'Leary Law Firm, Winchester, MA |    Paralegal   August 2014 – November 2015

  • Draft complaints, motions, memorandums, reports, and correspondence.

  • Conduct research; analyze laws, rules, regulations, policies, and procedures of the trial court and administrative courts of the Commonwealth.

  • Meet with clients.

  • Track cases through online data portals.


Office of the Bar Counsel, Boston, MA |    Law Clerk    May 2013 – May 2014

  • Worked with First Assistant Nancy Kaufman and Assistant Bar Counsel Sarah Chambers to investigate, evaluate, and prosecute complaints against lawyers.

  • Maintained caseload by tracking criminal cases and requesting documents from state and federal courts nationwide.

  • Conducted factual investigations of respondents.

  • Prepared memoranda and reports on cases and conducted research on ethical sanctions.


Suffolk County District Attorney’s Office, Boston, MA  |    Victim Witness Advocate   March 2011 – August 2012

  • Worked with prosecutors to assist victims and witnesses of crime in the South Boston Division of the Boston Municipal Court and in the Child Protection Unit.

  • Managed an independent case load in both the District and Superior Courts.

  • Participated in forensic interviews of children and adult victims of sexual assault and physical abuse.

  • Corresponded with victims and witnesses with case updates and worked with Boston Police Department.

  • Helped prepare victims and witnesses for testifying before Grand Jury and at trial.


Essex County District Attorney’s Office, Salem, MA  |    Victim Witness Advocate    June 2008 – March 2011

  • Advocated for victims and witnesses in the District and Superior Courts.

  • Assisted victims of domestic violence, including assisting with applications for Restraining Order and Harassment Prevention Orders.

  • Participated in domestic violence round tables in Lynn and Newburyport.

  • Worked with prosecutors in District and Superior Courts preparing witnesses for trial.


United Kingdom Parliament House of Commons, London, England  |    Intern    September 2007 – December 2007

  • Corresponded with constituents to set up tours of Parliament.

  • Prepared press releases on issues affecting the Carshalton and Wallington area.

  • Attended meetings with members of Parliament.


Worcester County District Attorney’s Office, Worcester, MA  |    Victim Witness Advocate Intern  July 2007 – September 2007

  • Worked alongside victim witness advocates to guide victims and witnesses of crimes.

  • Prepared letters for victims and witnesses with case updates.