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Turner, John-Mark

John-Mark Turner - Manchester, NH

Attorney at Sheehan Phinney

Business Litigation Lawyers in Manchester, NH

1000 Elm Street 17th Floor Manchester, NH 03101

  • 1 Super Lawyers®
  • 23 Years 
    Experience

Manchester Business Litigation Lawyer

Updated: 03/10/2026

Areas of Practice

  • Business Litigation
  • Appellate Litigation

Attorney Information

Overview

John-Mark is a business litigator with an emphasis on complex, high-stakes cases. He specializes in class actions, intellectual property litigation, and appellate work, and also has substantial experience in 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 Special Counsel to the State of New Hampshire. Among other matters, he successfully defended the Pease Tradeport in Town of Newington v. State, 162 N.H. 745 (Supreme Ct. 2011), and was lead counsel in Amanda D. Governor, a class action suit brought in 2012 challenging the State’s community mental health system that was settled in 2014.

Prior to joining the firm, John-Mark served as law clerk to the Hon. Michael Murphy, Circuit Judge for the United States Court of Appeals for the Tenth Circuit. While in law school, John-Mark was an Executive Editor for the California Law Review.


Awards and Honors

Super Lawyers® Selectees

SuperLawyers

John-Mark Turner included in a Super Lawyers® list

Honors

  • New England Super Lawyer, Business Litigation, since 2009

Other Sources of Feedback About John-Mark Turner

Included on the 2017 New England Super Lawyers list


Past Lists

  • 2016 New England Super Lawyers list
  • 2015 New England Super Lawyers list
  • 2014 New England Super Lawyers list
  • 2013 New England Super Lawyers list
  • 2012 New England Super Lawyers list
  • 2011 New England Super Lawyers list
  • 2010 New England Super Lawyers list
  • 2009 New England Super Lawyers list

Education

  • Legal Education

    • University of California, Berkeley, School of Law, Berkeley, California
      J.D.
      Law Review: California Law Review, Executive Editor
  • Non Legal Education

    • University of South Carolina
      B.S.

Current Employment Position(s)

  • Shareholder

Past Positions

  • Hon. Michael Murphy, Circuit Judge for the United States Court of Appeals for the Tenth Circuit, Law Clerk

Pro Bono Activities

  • Board of Directors of the Farnum Center, a treatment center for individuals dealing with alcohol and substance abuse

Representative Cases

  • Control Solutions, Inc. v. MicroDAQ.com, Inc., 2015 WL 5092593 (D. Oregon 2015): dismissal in favor of defendant accused of trademark infringement 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

Published Works

Articles

  • 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
  • When your AdWords keywords land you in court

Bar Admissions

  • New Hampshire
  • U.S. Tax Court
  • U.S. Court of Appeals 1st Circuit
  • U.S. Court of Appeals 2nd Circuit

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Contact

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Manchester, NH

1000 Elm Street
17th Floor
Manchester, NH 03101

Directions

Phone: 603-945-9922

Fax: 603-627-8121

Email: Send a message

Website: https://www.sheehan.com/

  • Credit Cards Accepted
  • Virtual Appointments

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