John Turner is a trial lawyer who represents plaintiffs and defendants in civil litigation across the United States. He has led trial teams to successful results in areas ranging from intellectual property to contract disputes to fiduciary claims. He also has played a central part in a number of high profile public interest cases in Texas.

John believes strongly in public service and civic involvement. He currently serves in the Texas Legislature and has been the State Representative for House District 114 in Dallas since 2019. In the House, he has served on the Appropriations, Environmental Regulation, Higher Education, County Affairs, and General Investigating Committees.

During his 20-year litigation career, John has represented clients in a wide variety of industries, from semiconductor manufacturing to telecommunications to energy to financial services. John handles matters in state court, in federal court, and in arbitration. He also has served as the co-chair of the firm’s Trade Secret Litigation Practice Group.

In every litigation matter, John emphasizes a few basic practices:

  • Presenting the law and the facts clearly to the decision-maker
  • Focusing on the core issues – and avoiding unnecessary disputes that consume time and energy
  • Communicating effectively and often with the client about strategies and objectives.

In John’s experience, the strongest representation is fully compatible with high standards of ethics, courtesy, and professionalism.

John grew up in the small east Texas town of Crockett and graduated from Crockett High School. He received degrees from Harvard College and Yale Law School, where he won the Thurman Arnold Prize as the best oral advocate in the school’s moot court competition. He served as a law clerk for the Honorable Lee H. Rosenthal of the United States District Court for the Southern District of Texas.

Before joining Haynes Boone in 2008, John was a partner in the Dallas office of Susman Godfrey, LLP.

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  • Represented a coalition of 88 Texas school districts in landmark litigation related to the adequacy of the school finance system in Texas. After trial, the district court ruled in favor of the school districts, finding that the system had evolved into an unconstitutional state property tax and did not provide funding sufficient to meet constitutional standards. While the Texas Supreme Court ultimately reversed the trial court’s judgment, the case influenced subsequent policy discussions about public education in Texas.
  • Represented the Halliburton Company in an arbitration in which the claimant alleged that Halliburton had misappropriated technology related to water treatment in hydraulic fracking. The claimant sought $300 million in damages. After a two-week evidentiary hearing, a three-arbitrator panel found that Halliburton did not misappropriate any technology and awarded zero damages.
  • Represented Halliburton as the plaintiff in a two-week jury trial in Dallas County, in which the jury awarded damages to Halliburton for another party’s trade secret misappropriation in the exact amount requested.
  • Represented the Dallas Police and Fire Pension System in several high-profile disputes related to the system’s efforts to improve its long-term financial stability.
  • Represented more than 30 Texas cities, including Dallas and Houston, challenging the proposed construction of a number of new coal-fired power plants across Texas.
  • House District 114 Representative, Texas House of Representatives; Appropriations Committee (86th Legislature); Environmental Regulation Committee (86th Legislature); Higher Education Committee (87th Legislature), County Affairs Committee (87th Legislature), and General Investigating Committee (87th Legislature)
  • Member of Dallas Regional Chamber’s Education and Workforce Council
  • Dallas Regional Chamber’s “Leadership Dallas” Class of 2014
  • Board Member, Dallas Democratic Forum
  • Leadership Board Member (former), North Texas Chapter of the American Diabetes Association
  • Board Member (former), Texas League of Conservation Voters
  • American Bar Association
  • Dallas Bar Association
  • Recognized in The Best Lawyers in America, Woodward/White, Inc., in Litigation - Antitrust (2013-2023)
  • Thurman Arnold Prize as Best Oral Advocate, Morris Tyler Moot Court of Appeals at Yale (1998)
  • Named the “Fire Fighter Champion of the Year” by the Texas State Association of Fire Fighters (2019) (as legislator)
  • Recognized as “Freshman Legislator of the Year” by the Combined Law Enforcement Associations of Texas (2019) (as legislator)
  • Named one of the “Best Freshman Legislators” by the publication Capitol Inside (2019) (as legislator)
  • Recognized as an “Outstanding Legislator” by the Association of Texas EMS Professionals (2019) (as legislator)
  • Barrister, Patrick E. Higginbotham American Inn of Court
  • Fellow, Texas Bar Foundation


J.D., Yale Law School, 2000

A.B., Social Studies, Harvard University, 1997


The Honorable Lee H. Rosenthal, U.S. District Court for the Southern District of Texas (2000-2001)



Court Admissions

U.S. Court of Appeals for the Fifth Circuit

U.S. District Court for the Eastern District of Texas

U.S. District Court for the Northern District of Texas

U.S. District Court for the Southern District of Texas

Press Release
Raquel Alvarenga to Participate in Dallas Regional Chamber's 2023 Leadership Dallas Program
August 15, 2022

Haynes and Boone, LLP Partner Raquel Alvarenga has been selected to participate in the Dallas Regional Chamber’s (DRC’s) prestigious Leadership Dallas program. Raquel is a member of the Labor and Employment Practice Group in Haynes Boone’s Dallas office. Founded in 1975, Leadership Dallas is the DRC’s flagship leadership development program designed to prepare a pipeline of diverse leaders to serv [...]