Dennis J. Sullivan

Dennis J. Sullivan



Dennis Sullivan is a shareholder with Stepp & Sullivan, P.C. in Houston. His trial practice has an emphasis in civil litigation, including representation of individuals injured by the negligence of others, including catastrophic injuries and those injured in aviation and maritime accidents.

Dennis has litigated or tried cases in all four federal districts of Texas, as well as federal and state courts in Texas, California, Indiana, Kentucky, Missouri, California, Florida, New Mexico, Louisiana, and Illinois. He has also successfully represented clients before administrative offices and courts and administrative appeal boards. He has successfully represented clients on numerous occasions before the U.S. Court of Appeals for the Fifth Circuit.

Dennis is a member of the Texas Bar Association and is licensed to practice before Texas State Courts, as well as Federal Courts in the Southern, Eastern and Northern Districts of Texas, and the Fifth Circuit Court of Appeals. He received his BBA in finance in 1988 from St. Mary’s University in San Antonio, Texas. He also attended St. Mary’s University Law School where he received his Juris Doctor degree in 1991. In 1991 through 1992, he was the briefing attorney for the Honorable Charles Bliel, Sixth Court of Appeals, Texas.

Dennis has been dedicated to assisting his clients since 1992, after having served as a briefing attorney to the Sixth Court of Appeals-Texas. He has over 25 years of experience in cases involving civil litigation matters, including personal injuries, nursing home neglect matters, and Jones Act, offshore injuries, longshoreman injuries, as well as catastrophic injuries resulting from aviation accidents, trucking accidents, and other personal injury and death matters.

Contact Stepp & Sullivan, P.C. online or by phone at (713) 336-7200 to schedule a consultation today.


  • St. Mary’s University School of Law, Doctor of Jurisprudence
  • St. Mary’s University, B.B.A., Finance

Bar & Court Admissions

  • State Bar of Texas
  • Texas State Courts
  • Federal Courts for the Southern, Eastern and Northern Districts of Texas
  • Fifth Circuit Court of Appeals

Professional Memberships

  • Past Board Member Houston Aviation Advisory Council
  • Member Million Dollar Advocates Forum
  • Member Multi-Million Dollar Advocates Forum
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