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Dennis Sullivan is a shareholder with Stepp & Sullivan, P.C. in Houston. His trial practice has an emphasis in civil litigation in All things Family.  He represents spouses in divorce actions, seeking to protect themselves from unreasonable asset and property distributions,  unreasonable child custody requests, and those seeking to protect their assets to the fullest extent.  Dennis is a proficient trial lawyer, and in addition to representing parties in family matters, represents individuals injured by the negligence of others, including catastrophic injuries.  Dennis is a successful litigator and has been admitted to the million-dollar advocates forum as well as the multi-million dollar advocates forum.

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 as well as state courts of appeal.

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 1991.  Dennis 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 trial litigation in family matters, personal injuries, as well as catastrophic injury 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

  • State Bar of Texas
  • International Propeller Club, Port of Houston, President 2011-2014
  • International Propeller Club, Port of Houston, Board Member 2008-2014
  • Boy Scouts of America – Scoutmaster
  • Knights of Columbus

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