Jack defends attorneys and other professionals in consumer-protection and malpractice matters; he defends creditors and collection professionals in all types of consumer-protection and enforcement claims and suits; he represents insurers in coverage disputes; he defends employers in employment matters; and he represents defendants in personal-injury actions.

Jack has extensive trial and appellate experience. He has tried cases in the state and federal courts of Massachusetts and Maine, and has briefed and/or argued appeals in both of the Massachusetts appellate courts, the New Hampshire Supreme Court, the United States Supreme Court and the United States Courts of Appeal for the First, Second, and Fifth Circuits.

Jack previously served judicial clerkships with the Massachusetts Appeals Court and the Massachusetts Supreme Judicial Court.

Flightlevel Norwood, LLC v. Boston Executive Helicopters, LLC, No. 23-P-1428; 105 Mass. App. Ct. 1114; 2025 WL 471187 (Feb. 12, 2025) (Trade Practices Act)
Bertolino v. Sequium Asset Solutions, LLC, No. 22-11139; 2023 WL 2992646 (D. Mass. April 18, 2023) (FDCPA)
Katz v. Belveron Real Estate Partners, LLC, 28 F. 4^th 300 (1^st Cir. 2022) (fraud, civil conspiracy, trade practices act).
Chalifoux v. James, No. 20-P-364, 100 Mass. App. Ct. 1127 (2022) (lawyer professional liability).
Mentis Sciences, Inc. v. Pittsburgh Networks, LLC, 173 N.H. 584 (2020) (contract, negligence).
Mahoney v. Bernat, 2019 WL 6497601 (Mass. Super. 2019) (lawyer professional liability).
Lecaj v. J.C. Christensen and Assoc., Inc., No. 16-CV-10498 (D. Mass. April 20, 2016) (FDCPA, FCRA).
Hudson v, Babilonia, No. 14-CV-01646 (D. Conn. June 14, 2016) (FDCPA, FCRA, TCPA).
Searle v. Convergent Outsourcing, Inc., No. 13-CV-11914 (D. Mass. June 13, 2014) (FCRA).
Murphy v. Law Offices of Howard Lee Schiff, P.C., No. 13-CV-10724 (D. Mass. Feb. 25, 2014) (lawyer professional liability).
O’Callaghan v. Shirazi, 204 Fed. Appx. 35 (1^st Cir. 2006) (lawyer professional liability).
Massachusetts Asset Financing Corp. v. Harter, Secrest & Emery, LLP, 430 F. 3d 59 (1^st Cir. 2005) (lawyer professional liability).
Stewart v. Dutra Const. Co., 543 U.S. 481 (2005) (admiralty; personal injury).
Stewart v. Dutra Const. Co., 230 F. 3d 461 (1^st Cir. 2003) (admiralty, personal injury).
Stratton v. National Union Fire Insurance Company, 2004 U.S. Dist. LEXIS 17613 (D. Mass. Sept. 3, 2004) (insurance coverage).
Zimmerman v. Direct Federal Credit Union, 262 F.3d 70 (1^st Cir. 2001) (employment).
Martin v. Sands, 62 F. Supp. 2d 196 (D. Mass. 1999) (lawyer professional liability; FDCPA).
Zapata Corp. v. National Union Fire Ins. Co., 1998 U.S. Dist. LEXIS 22663 (S.D. Tex. July 6, 1998) (insurance coverage).
Reliant Airlines, Inc. v. Broome County, 122 F. 3d 1057 (2d. Cir. 1997) (personal injury).
Dias v. Vose, 50 F. 3d 1 (1st Cir. 1995) (civil rights).
Commercial Union Ins. Co. v. Gilbane Building Co., 992 F.2d 386 (1^st Cir 1993) (contract).
Bank One, Texas v. Montle, 974 F.2d 220 (1^st Cir. 1992) (contract).
Putnam v. DeRosa, 963 F.2d 480 (1^st Cir. 1992) (consumer protection act; fraud).
Jessamey v. Norfolk Financial Corp., 2006 Mass. App. Div. 82 (2006) (FDCPA, consumer protection act).
Palriwala v. Palriwala, 64 Mass. App. Ct. 663 (2005) (contract).
Day v. Kerkorian, 61 Mass. App. Ct. 804 (2004) (lawyer professional liability).
Ramsdell v. Doliber, 59 Mass. App. Ct. 446 (2003) (lawyer professional liability).
Drywall Systems, Inc. v. ZVI Const. Co., 435 Mass. 664 (2002) (trade practices act).
New Hampshire Ins. Co. v. McCann, 429 Mass. 202 (1999) (lawyer professional liability).
Sylvia v. Johnson, 44 Mass. App. Ct. 483 (1998) (trusts; contract).
Mitchell v. Stop & Shop, 41 Mass. App. Ct. 521 (1996) (personal injury; insurance coverage).
Beacon Sales Corp. v. American Employers Ins. Co., 40 Mass. App. Ct. 1119 (1996) (construction; trade practices act).

Professional and Civic

ACA International Members Attorney Program, member
Massachusetts Bar Association, member
Maine Bar Association, member
Professional Liability Underwriting Society, member
Boston University Law School, First-Year Writing Program, 1995-1997
Duxbury Youth Baseball, Board of Directors and past president, 2008-2015

Admissions

MaineMassachusettsU.S. Court of Appeals, First CircuitU.S. District Court, District of MassachusettsU.S. Supreme Court

Education

Catholic University School of Law

JD

with honors (Editor, Catholic University Law Review, 1987-1989)

American International College

BA

summa cum laude

Capabilities

John J. O’Connor

Member

joconnor@harrisbeachmurtha.com

John J. O’Connor

joconnor@harrisbeachmurtha.com

D: (617) 951-2077

Boston, MA - Federal Reserve Office

Profile

Jack defends attorneys and other professionals in consumer-protection and malpractice matters; he defends creditors and collection professionals in all types of consumer-protection and enforcement claims and suits; he represents insurers in coverage disputes; he defends employers in employment matters; and he represents defendants in personal-injury actions.

Jack has extensive trial and appellate experience. He has tried cases in the state and federal courts of Massachusetts and Maine, and has briefed and/or argued appeals in both of the Massachusetts appellate courts, the New Hampshire Supreme Court, the United States Supreme Court and the United States Courts of Appeal for the First, Second, and Fifth Circuits.

Jack previously served judicial clerkships with the Massachusetts Appeals Court and the Massachusetts Supreme Judicial Court.

Areas of Expertise

Legal Practices

Member of:

Business Litigation

Please select listing to show.

Admissions

MaineMassachusettsU.S. Court of Appeals, First CircuitU.S. District Court, District of MassachusettsU.S. Supreme Court

Representative Matters

Flightlevel Norwood, LLC v. Boston Executive Helicopters, LLC, No. 23-P-1428; 105 Mass. App. Ct. 1114; 2025 WL 471187 (Feb. 12, 2025) (Trade Practices Act)
Bertolino v. Sequium Asset Solutions, LLC, No. 22-11139; 2023 WL 2992646 (D. Mass. April 18, 2023) (FDCPA)
Katz v. Belveron Real Estate Partners, LLC, 28 F. 4^th 300 (1^st Cir. 2022) (fraud, civil conspiracy, trade practices act).
Chalifoux v. James, No. 20-P-364, 100 Mass. App. Ct. 1127 (2022) (lawyer professional liability).
Mentis Sciences, Inc. v. Pittsburgh Networks, LLC, 173 N.H. 584 (2020) (contract, negligence).
Mahoney v. Bernat, 2019 WL 6497601 (Mass. Super. 2019) (lawyer professional liability).
Lecaj v. J.C. Christensen and Assoc., Inc., No. 16-CV-10498 (D. Mass. April 20, 2016) (FDCPA, FCRA).
Hudson v, Babilonia, No. 14-CV-01646 (D. Conn. June 14, 2016) (FDCPA, FCRA, TCPA).
Searle v. Convergent Outsourcing, Inc., No. 13-CV-11914 (D. Mass. June 13, 2014) (FCRA).
Murphy v. Law Offices of Howard Lee Schiff, P.C., No. 13-CV-10724 (D. Mass. Feb. 25, 2014) (lawyer professional liability).
O’Callaghan v. Shirazi, 204 Fed. Appx. 35 (1^st Cir. 2006) (lawyer professional liability).
Massachusetts Asset Financing Corp. v. Harter, Secrest & Emery, LLP, 430 F. 3d 59 (1^st Cir. 2005) (lawyer professional liability).
Stewart v. Dutra Const. Co., 543 U.S. 481 (2005) (admiralty; personal injury).
Stewart v. Dutra Const. Co., 230 F. 3d 461 (1^st Cir. 2003) (admiralty, personal injury).
Stratton v. National Union Fire Insurance Company, 2004 U.S. Dist. LEXIS 17613 (D. Mass. Sept. 3, 2004) (insurance coverage).
Zimmerman v. Direct Federal Credit Union, 262 F.3d 70 (1^st Cir. 2001) (employment).
Martin v. Sands, 62 F. Supp. 2d 196 (D. Mass. 1999) (lawyer professional liability; FDCPA).
Zapata Corp. v. National Union Fire Ins. Co., 1998 U.S. Dist. LEXIS 22663 (S.D. Tex. July 6, 1998) (insurance coverage).
Reliant Airlines, Inc. v. Broome County, 122 F. 3d 1057 (2d. Cir. 1997) (personal injury).
Dias v. Vose, 50 F. 3d 1 (1st Cir. 1995) (civil rights).
Commercial Union Ins. Co. v. Gilbane Building Co., 992 F.2d 386 (1^st Cir 1993) (contract).
Bank One, Texas v. Montle, 974 F.2d 220 (1^st Cir. 1992) (contract).
Putnam v. DeRosa, 963 F.2d 480 (1^st Cir. 1992) (consumer protection act; fraud).
Jessamey v. Norfolk Financial Corp., 2006 Mass. App. Div. 82 (2006) (FDCPA, consumer protection act).
Palriwala v. Palriwala, 64 Mass. App. Ct. 663 (2005) (contract).
Day v. Kerkorian, 61 Mass. App. Ct. 804 (2004) (lawyer professional liability).
Ramsdell v. Doliber, 59 Mass. App. Ct. 446 (2003) (lawyer professional liability).
Drywall Systems, Inc. v. ZVI Const. Co., 435 Mass. 664 (2002) (trade practices act).
New Hampshire Ins. Co. v. McCann, 429 Mass. 202 (1999) (lawyer professional liability).
Sylvia v. Johnson, 44 Mass. App. Ct. 483 (1998) (trusts; contract).
Mitchell v. Stop & Shop, 41 Mass. App. Ct. 521 (1996) (personal injury; insurance coverage).
Beacon Sales Corp. v. American Employers Ins. Co., 40 Mass. App. Ct. 1119 (1996) (construction; trade practices act).

Distinctions

Professional and Civic

ACA International Members Attorney Program, member
Massachusetts Bar Association, member
Maine Bar Association, member
Professional Liability Underwriting Society, member
Boston University Law School, First-Year Writing Program, 1995-1997
Duxbury Youth Baseball, Board of Directors and past president, 2008-2015

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Content current as of October 13, 2026 3:40 am