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About me

Sean is a partner and founder of the firm, O'Connor, Carnathan and Mack, who
focuses his practice in complex business litigation.  He has been litigating since 1993 and has
appeared in state and federal courts all over the country.  He has substantial experience with director,
officer and shareholder litigation, trust fund litigation and insolvency
related litigation.  Sean has also
prosecuted a number of significant claims for unpaid wages and has helped
secure recoveries for clients which, in the aggregate, exceed $1.3 million.  He regularly advises corporate executives in
transition regarding their employment contracts and non-compete
obligations.  Sean is a regular
commentator on legal issues and has published many articles over the years.


Practice areas


  1. Litigation: 100%
    23 years



Free consultation (30 minutes)

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Contact info

Landmark One, 1 Van der Graaff
Suite 104
Burlington, MA, 01803


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Litigation -- Trusts and EstatesBest Lawyers in America2017
Super LawyerThomson Reuters2016
Litigation -- Trusts and EstatesBest Lawyers in America2016
Super LawyerThomson Reuters2015
Super LawyerThomson Reuters2014
Super LawyerThomson Reuters2013
Super LawyerThomson Reuters2012
Super LawyerThomson Reuters2011
Super LawyerThomson Reuters2010
FellowLitigation Counsel of America, Trial Lawyer Honorary Society2010
AV Preeminent 5.0 out of 5 Peer Review RatedMartindale-Hubbell2010
AV Preeminent 5.0 out of 5 Peer Review RatedMartindale-Hubbell2009
Super LawyerThomson Reuters2009
AV Preeminent 5.0 out of 5 Peer Review RatedMartindale-Hubbell2008
Super LawyerThomson Reuters2008
AV Preeminent 5.0 out of 5 Peer Review RatedMartindale-Hubbell2007
AV Preeminent 5.0 out of 5 Peer Review RatedMartindale-Hubbell2006
Work experience
TitleCompany nameDuration
Junior Partner (Associate through 2000)WILMERHALE1998 - 2003
Ames FellowHarvard Law School1997 - 1998
Law Clerk to the Hon. Paul L. RudmanMaine Supreme Judicial Court1993 - 1994
Association namePosition nameDuration
American Bar AssociationEditor, Litigation News2004 - Present
Publication nameTitleDate
Litigation News (ABA)Second Circuit Approves Attorney Advertising2010
Litigation News (ABA)Pragmatism, but No Compassion in Foreclosure2010
Litigation News (ABA)New Rules for Retiring Judges and Firms That Hire Them2009
Litigation News (ABA)Delaware High Court Issues Game-Changer on Fiduciary Duty2009
Litigation News (ABA)Court Hits Pause in Case Involving Internet Video of Deposition2009
Litigation News (ABA)Court Orders Daubert Hearing as Part of Class Certification Analysis2008
Litigation News (ABA)Derivative Claims: Not Just for Shareholders Anymore2008
Litigation News (ABA)Judges Moved to Poetry and Quoting Billy Madison2008
Litigation News (ABA)Corporations Balk at Outside Counsels' Automatic Rate Increases2008
Litigation News (ABA)Lawyers Approaching Retirement Age Face Career and Lifestyle Decisions2007
Litigation News (ABA)D.C. Bar Adopts Rule of Professional Conduct for Nonlegal Services2007
Litigation News (ABA)Criminals Forfeit Retirement Benefits to Victims2007
Litigation News (ABA)New Jersey Upholds Privacy Rights in Internet Accounts2007
Litigation News (ABA)New Jersey Invalidates Class Action Arbitration Waiver2007
Litigation News (ABA)Fee Applications and Block Billing Don't Mix2006
Litigation News (ABA)Eleventh Circuit Criticizes Arbitration Award Appeals2006
Litigation News (ABA)Rules on Witness Conferences in Depositions Vary2006
Litigation News (ABA)Trial Court Win Reversed for Spoilation2006
Litigation News (ABA)California Invalidates Contractual Jury Trial Waivers2006
Litigation News (ABA)Partner Sanctioned for Associate's Errors2005
Litigation News (ABA)New York City Bar Issues Opinion on Dual Representation2005
Litigation News (ABA)Large Law Firms Hiring More General Counsel2005
Litigation News (ABA)Taped Deposition Not "Reality TV"2005
Litigation News (ABA)California Simplifies Jury Instructions2005
Litigation News (ABA)Audit Response Deemed Work Product Under California Law2005
Massachusetts Lawyers WeeklyJust Say No to Hostile Takeovers in Massachusetts2003
Business Law Today (ABA)Will the Company Cover an Ex-Officer's Legal Costs? The New World of Sarbanes-Oxley2003
Business Law Today (ABA)Discovery in Arbitration? Well, It Depends...2001
13 Me. Bar J. 316Re-Assessing the Trial Court's Opportunity to Assess Credibility1998
Alabama Law ReviewPatent Priority Disputes A Proposed Re-Definition of First-to-Invent1998
11 Me. Bar J. 244Presenting an Attorney's Fee Application in the United States District Court for the District of Maine1996
9 Me. Bar J. 318Hints on Writing Law Court Briefs from Some People Who Read Them1994
School nameMajorDegreeGraduated
Harvard University Law SchoolN/ALL.M - Master of Laws1997
University of Maine School of LawLawJD - Juris Doctor1993
Bowdoin CollegeLiteratureA.B., magna cum laude1986
Speaking engagements
Conference nameTitleDate
Continuing Legal Education PanelRemedies in a Close Corporation or Family-Held Business Dispute2014