Our Attorneys

John D. Hadden

Stefan C. Turkheimer

John D. Hadden

John D. Hadden is a founding partner of Turkheimer & Hadden, LLC. An experienced trial and appellate lawyer, he is author of three respected treatises on Georgia litigation practice, Green's Georgia Law of Evidence, Georgia Law of Torts - Trial Preparation and Practice (co-author with Kenneth Shigley), and Georgia Magistrate Court Handbook, all published by Thomson Reuters Westlaw, and is a frequent lecturer at continuing legal education seminars.

John has handled a wide variety of trial and appellate matters in the state and federal courts of Georgia, including representation of both plaintiffs and defendants in civil cases and the prosecution and defense of felony and misdemeanor criminal matters. Before founding the firm, he was a litigator at a prominent Atlanta firm, where he represented numerous commercial and business interests and defended clients in personal injury, wrongful death, and property damage claims. He now concentrates his practice on catastrophic personal injury and wrongful death claims, as well as commercial and business disputes. A native of the Augusta, Georgia area, John handles cases around the state of Georgia.

Legal Background & Education

John graduated with honors from the University of Georgia School of Law in Athens, where he was a member of the Georgia Law Review. While in law school, John served as a student clerk for the judges of the State Court of Cherokee County and worked in the Office of the District Attorney for Rockdale County, prosecuting felony and misdemeanor criminal cases. John earned his bachelor's degree from Emory University, where he majored in History and Environmental Studies and was philanthropy chairman of Emory's Interfraternity Counsel. During college, he worked at the state capitol in the Office of the Governor.

John is president of the Atlanta Trial Lawyers Association, a member of the Atlanta Bar Association, where he is a member of the Litigation Section Board of Directors and treasurer for 2017-2018, and the Georgia Trial Lawyers Association, where he is a member of the Amicus Curiae Committee, assisting attorneys from around the state in matters before appellate courts. He also serves on the Board of Governors of the American Association for Justice New Lawyers Division and is past chair of the Litigation Committee of the State Bar of Georgia Young Lawyers Division. He is a Master in Emory University School of Law's Lamar American Inn of Court.

In his free time, John is an avid private pilot and SCUBA diver. He also frequently serves as a volunteer judge for moot court and mock trial competitions at the high school and law school level. He is currently chairman of the board of directors of the Georgia Network to End Sexual Assault, a group responsible for providing guidance and training to rape crisis centers throughout Georgia.

John is a member of the bar of the United States Supreme Court and is admitted to practice before all Georgia trial courts as well as the Georgia Court of Appeals and the Georgia Supreme Court. He is also admitted to the United States District Courts for the Northern, Middle, and Southern Districts of Georgia and the United States Court of Appeals for the Eleventh Circuit.

Speaking Engagements

  • Documenting the Extent of the Injury, presented at Damages in Personal Injury seminar (National Business Institute, October 2015) (forthcoming)
  • Evidence and Preserving Error for Appeal, presented at Annual Convention (GTLA, April 2015) (forthcoming)
  • Hospital Liens and Medicare Reimbursement Issues, presented at Annual Convention (GTLA, April 2015) (forthcoming)
  • Trial and Error, seminar chair (ICLE, March 2015)
  • Advanced Insurance Coverage Issues; Social Media, the Internet, and Electronically Stored Information, presented at Advanced Issues in Personal Injury Litigation seminar (National Business Institute, December 2014)
  • Post-settlement Considerations, presented at Secrets to a Plaintiff's Personal Injury Practice seminar (ICLE, September 2014)
  • Preservation of Error for Appeal, presented at Annual Convention (GTLA, April 2014)
  • Trial and Error, seminar chair (ICLE, March 2014)
  • Judicial Panel Discussion (moderator), Appellate Practice seminar (ICLE, February 2014)
  • Holiday Workshop, seminar chair (GTLA, December 2013)
  • Documenting the Extent of the Injury, presented at Damages in Personal Injury seminar (National Business Institute, December 2013)
  • Use of Evidence at Trial, presented at Trial Practice Manual seminar (GTLA, September 2013)
  • Georgia's New Evidence Code: Practice Pointers and Pitfalls, presented to Solo and Small Firm section meeting (Atlanta Bar Association, August 2013)
  • New Lawyers Division Seminar, seminar chair at Annual Convention (GTLA, May 2013)
  • Trial and Error, seminar chair (ICLE, March 2013)
  • The Other Side of the Bench: Practice Suggestions from Former Appellate Jurists (moderator), at Appellate Practice seminar (ICLE, March 2013)
  • Filing the Police Lawsuit, presented at Handling Police Cases seminar (National Business Institute, August 2012)
  • Effective Lien Resolution Strategies, presented at Auto Torts seminar (GTLA, July 2012)
  • Identifying FLSA Overtime Violations, presented at Annual Convention (GTLA, May 2012)
  • New Lawyers Division Seminar, seminar chair at Annual Convention (GTLA, May 2012)
  • Countdown to Trial, presented at Plaintiff's Personal Injury seminar (ICLE, March 2012)
  • Federal versus State Court, presented at Trial and Error seminar (ICLE, March 2012)
  • Preservation of Error for Appeal, presented at Handling Fall Cases seminar (ICLE, February 2012)
  • Georgia's New Evidence Code, presented at Highlights of Essential Practice Areas for Solo Practitioner and Small Firm seminar (ICLE, December 2011)
  • Judicial Perspectives on Effective Trial Advocacy (moderator), at Trial and Error seminar (ICLE, March 2011)
  • War Stories in Litigation, State Bar of Georgia Young Lawyers Division Continuing Legal Education Series (Program Chairperson, February – April 2010)
  • Resolving Liens and Maximizing Your Client's Recovery, presented at Winning Settlement Demand Packages seminar (ICLE, January 2010)
  • Key Issues in Presenting Evidence of Psychological Injuries, presented at Holiday Convention (GTLA, December 2009)


  • Georgia Law of Torts – Trial Preparation and Practice (Thomson Reuters Westlaw – co-author with Kenneth Shigley)
  • Green's Georgia Law of Evidence (Thomson Reuters Westlaw)
  • Georgia Magistrate Court Handbook (Thomson Reuters Westlaw - co-author)
  • Georgia's New Evidence Code: Practice Pointers and Pitfalls (The Verdict/GTLA, Spring 2013)
  • Mediation Preparation and Practice for the Plaintiff's Lawyer (The Verdict/GTLA, Summer 2012)
  • An Interview with Chief Justice Carley (The Sidebar/American Association for Justice, Summer 2012)
  • United States Supreme Court Revisits Due Process Limitation on "Stream of Commerce" Exercise of Personal Jurisdiction (The Sidebar/American Association for Justice, Fall 2011)
  • United States Supreme Court Weighs in on Judicial Recusal in Light of Campaign Donations (The Verdict/GTLA, Summer 2010)
  • Ban Now in Place on Certain Text Messaging and Phone Calls, guest column (The Cherokee Tribune, July 4, 2010)
  • Out-of-State Reinsurer Required to Post Collateral Before Litigating in Connecticut, (Insurance/Reinsurance/Managed Healthcare Review, Spring 2007)

Memberships, Activities, and Awards

  • State Bar of Georgia (Young Lawyers Division Litigation Committee Chair (2011-2013), Leadership Academy Class of 2011)
  • American Association for Justice (New Lawyers Division Board of Governors, Amicus Curiae Committee)
  • Georgia Trial Lawyers Association (Amicus Curiae Committee, Communications Committee chair-elect)
  • Atlanta Trial Lawyers Association (President)
  • Atlanta Bar Association (Litigation Section Board of Directors, 2015-2016)
  • Lawyers Club of Atlanta
  • Georgia SuperLawyers (2014-2015)
  • Georgia SuperLawyers Rising Stars (2011-2013)
  • Georgia Trend Legal Elite (Appellate Practice; General Practice; Personal Injury)
  • Million Dollar Advocates Forum (Life Member)
  • The National Trial Lawyers: Top 100 Trial Lawyers (Georgia)
  • The National Trial Lawyers: Top 40 Under 40 (Georgia)
  • Logan E. Bleckley American Inn of Court - Georgia State University College of Law (Barrister)
  • Lamar American Inn of Court - Emory University School of Law (Barrister)
  • Georgia Trial Lawyers Association 2014 Community Service Award

Stefan C. Turkheimer

Stefan Turkheimer is a founding partner of Turkheimer & Hadden.

Prior to the firm's founding, Stefan was a litigator at one of the preeminent workers compensation insurance defense firms in Georgia. He defended Fortune 500 employers against lawsuits in tort and workers' compensation. During his legal career Stefan has handled hundreds of workers' compensation cases. He graduated, with honors, from the University of Georgia School of Law in 2004.

While in law school, Stefan was an editor of the Intellectual Property Journal, a highly selective national legal journal that is ranked number two in the nation among intellectual property journals. Additionally, he participated in the Russell Moot Court competition and the J. Ralph Beard Closing Argument Competition, and was chairman of the Intellectual Property Association's Trademark and Sports Law Section.

Stefan was a judicial law clerk at the Supreme Court of New York for Justices Karla Moskowitz and Marcy Klein. He also served in the District Attorney's Office in Athens-Clarke County under District Attorney Ken Mauldin. Stefan was responsible for prosecuting felonies and while there served as prosecutor in over 40 trials.

Following law school, Stefan was Deputy Communications Director for United States Congresswoman Denise Majette before becoming finance director for Lieutenant Governor Mark Taylor's gubernatorial campaign. He also served as a finance consultant for Jim Martin in his bid for higher office.

For Turkheimer & Hadden, Stefan concentrates his practice on severe personal injury actions as well as workers compensation.