John F. Sullivan  III - K&L Gates

John F. Sullivan III

Listed in Best Lawyers since 2012

John F. Sullivan III handles complex commercial disputes, whether in state or federal courts or in arbitration. Although he focuses his practice on energy-related disputes, including oil and gas matters, his deep experience includes litigating commercial agreements, trade secrets and other intellectual property, officer and director responsibilities, professional liability, unfair competition, shareholder oppression, indemnity rights and fiduciary duty matters. John also has significant experience in tort litigation, including cases arising from catastrophic accidents such as plant explosions, products liability, aviation and pharmaceuticals.

John is a passionate advocate and has not only tried many lawsuits to judge and jury, but has also handled high stakes arbitrations. He has also represented clients successfully in class certification proceedings and in numerous injunction hearings. John has appellate experience too, briefing and arguing cases to the higher state and federal courts, and has represented clients in countless alternative dispute resolution proceedings. He is certified as a specialist in the separate legal fields of civil trial law and personal injury trial law by the Texas Board of Legal Specialization.

Notwithstanding his zeal for advocacy, his overarching goal in each representation is to provide great service and wise and trustworthy counsel in order to obtain the result the client needs and desires—whether that result occurs after a trial or arbitration or pre-trial, or even pre-filing. In addition to his litigation practice, he has devoted considerable time and effort to human rights causes, such as the representation of human trafficking victims and children seeking asylum.

University of OklahomaBA 1984University of HoustonJ.D. 1987

Case History

Other Court Admissions
  • Supreme Court of the United States
  • United States Court of Appeals for the Fifth Circuit
  • United States Court of Appeals for the Second Circuit
  • United States Court of Appeals for the Third Circuit

Client Comments

"John Sullivan is a tremendous attorney. He is very effective and a pleasure to work with in complex litigation matters."

Office Location

1000 Main Street, Suite 2550
Houston, TX 77002
United States

Practice Areas

Commercial Litigation