- Cheng v. Neumann, 51 F.4th 438 (1st Cir 2022) - affirming lower court decision dismissing defamation claims on First Amendment grounds
- Rand v. State, 2025 NH 27 (2025) - reversing injunction and declaration that New Hampshire's Statewide Educational Property Tax was unconstitutional
- Control Solutions, Inc. v. MicroDAQ.com, Inc., 2015 WL 5092593 (D. Oregon 2015): dismissal in favor of defendant accused of trademark infringment through use of Google AdWords
- Passatempo v. McMenimen, 86 Mass. App. Ct. 742 (Mass. Appeals Ct. 2014): upholding large jury verdict against insurance company whose agent defrauded insured
- Starbucks Corporation v. Wolfe’s Borough Coffee, Inc.,736 F.3d 198 (2d Cir. 2013): judgment for defendant accused by Starbucks of trademark infringement, dilution, and unfair competition.
- Achille v. Achille, 117 A.3d 1144 (N.H. Supreme Ct. 2015): upholding trial court restraining order in multi-million dollar divorce case.
- Kimball Union Academy v. Genovesi, 165 N.H. 132 (N.H. Supreme Ct. 2013): upholding jurisdiction against engineer sued for professional negligence.
- Town of Newington v. State, 162 N.H. 745 (N.H. Supreme Ct. 2011): affirming judgment for State authority sued by municipality over wetlands zoning regulations
- South Willow Properties, LLC v. Burlington Coat Factory, 159 N.H. 494 (N.H. Supreme Ct. 2011): affirming eviction and damages claim on behalf of commercial landlord
- Wright v. R.R. Donnelley & Sons Co. Group Benefits Plan, 402 F.3d 67 (1st Cir. 2005): affirming judgement in favor of insurer on ERISA claims
John-Mark Turner
Shareholder
Manchester
Phone:(603) 627-8150
Email:jturner@sheehan.com
ABOUT JOHN-MARK TURNER
John-Mark is a litigator with an emphasis on complex, high-stakes cases. He specializes in class actions, intellectual property litigation, constitutional litigation and appellate work, and also has substantial experience in environmental cases, defamation cases, ERISA defense, securities/corporate litigation, and commercial real estate disputes.
He has a long track record of success representing a wide variety of industries and clients including manufacturers, software developers, insurers, schools and universities, professional practices, and online retailers. In addition, John-Mark regularly acts as counsel to the State of New Hampshire and local municipalities. Among other matters, he successfully defended the Pease Tradeport in Town of Newington v. State, 162 N.H. 745 (2011), was lead counsel in Amanda D. v. Governor, a class action suit brought in 2012 challenging the State’s community mental health system that was settled in 2014, and counsel for the New Hampshire Site Evaluation Committee's Investigatory Subcommittee for a wind project in Antrim. On behalf of a coalition of towns and cities across the state, John-Mark also successfully defended New Hampshire’s Statewide Educational Property Tax from a constitutional attack in Rand v. State, 2025 NH 27 (2025).
KEY CASES
EDUCATION
- J.D., University of California at Berkeley Boalt Hall School of Law
- B.S., University of South Carolina
ADMISSIONS, MEMBERSHIPS & CERTIFICATIONS
- State of New Hampshire
- United States Tax Court
- United States Court of Appeals for the First and Second Circuits
AWARDS
- New England Super Lawyer, Business Litigation, since 2009
PUBLICATIONS
- When your AdWords keywords land you in court
- Who is Liable for Overweight Truck Fines?
- Software Developers Need to Check Their Insurance Policies
- Supreme Court At-a-Glance
- After a Recent New Hampshire Supreme Court Decision, Businesses Should Take Another Look at Their Commission Agreements With Their Sales Forces
- Physician - Hospital Ambulatory Surgery Center: A Compliance Guide - Part 1
INDUSTRY & CIVIC INVOLVEMENT
- John-Mark previously served on the Board of Directors of the Farnum Center, a treatment center for individuals dealing with alcohol and substance abuse, and New Hampshire Legal Assistance.
ATTORNEY /
John-Mark Turner
Shareholder
Manchester
Business Litigation • Appellate Litigation
ABOUT JOHN-MARK TURNER
John-Mark is a litigator with an emphasis on complex, high-stakes cases. He specializes in class actions, intellectual property litigation, constitutional litigation and appellate work, and also has substantial experience in environmental cases, defamation cases, ERISA defense, securities/corporate litigation, and commercial real estate disputes.
KEY CASES
Cheng v. Neumann, 51 F.4th 438 (1st Cir 2022) - affirming lower court decision dismissing defamation claims on First Amendment grounds
Rand v. State, 2025 NH 27 (2025) - reversing injunction and declaration that New Hampshire's Statewide Educational Property Tax was unconstitutional
Control Solutions, Inc. v. MicroDAQ.com, Inc., 2015 WL 5092593 (D. Oregon 2015): dismissal in favor of defendant accused of trademark infringment through use of Google AdWords
Passatempo v. McMenimen, 86 Mass. App. Ct. 742 (Mass. Appeals Ct. 2014): upholding large jury verdict against insurance company whose agent defrauded insured
Starbucks Corporation v. Wolfe’s Borough Coffee, Inc.,736 F.3d 198 (2d Cir. 2013): judgment for defendant accused by Starbucks of trademark infringement, dilution, and unfair competition.
Achille v. Achille, 117 A.3d 1144 (N.H. Supreme Ct. 2015): upholding trial court restraining order in multi-million dollar divorce case.
Kimball Union Academy v. Genovesi, 165 N.H. 132 (N.H. Supreme Ct. 2013): upholding jurisdiction against engineer sued for professional negligence.
Town of Newington v. State, 162 N.H. 745 (N.H. Supreme Ct. 2011): affirming judgment for State authority sued by municipality over wetlands zoning regulations
South Willow Properties, LLC v. Burlington Coat Factory, 159 N.H. 494 (N.H. Supreme Ct. 2011): affirming eviction and damages claim on behalf of commercial landlord
Wright v. R.R. Donnelley & Sons Co. Group Benefits Plan, 402 F.3d 67 (1st Cir. 2005): affirming judgement in favor of insurer on ERISA claims
EDUCATION
- J.D., University of California at Berkeley Boalt Hall School of Law
- B.S., University of South Carolina
ADMISSIONS, MEMBERSHIPS & CERTIFICATIONS
- State of New Hampshire
- United States Tax Court
- United States Court of Appeals for the First and Second Circuits
AWARDS
- New England Super Lawyer, Business Litigation, since 2009
PUBLICATIONS
- When your AdWords keywords land you in court
- Who is Liable for Overweight Truck Fines?
- Software Developers Need to Check Their Insurance Policies
- Supreme Court At-a-Glance
- After a Recent New Hampshire Supreme Court Decision, Businesses Should Take Another Look at Their Commission Agreements With Their Sales Forces
- Physician - Hospital Ambulatory Surgery Center: A Compliance Guide - Part 1
INDUSTRY & CIVIC INVOLVEMENT
- John-Mark previously served on the Board of Directors of the Farnum Center, a treatment center for individuals dealing with alcohol and substance abuse, and New Hampshire Legal Assistance.