About
Mark VanCleave is a proven Texas personal injury attorney with more than 25 years of experience fighting for clients injured through negligence. He leads the Law Offices of Mark D. VanCleave, PLLC, where he focuses on serious injury and wrongful death cases. His practice includes motor vehicle collisions, trucking accidents, commercial vehicle crashes, premises injuries, and claims involving defective products. Mark is committed to holding at-fault parties accountable and guiding clients through every stage of their case.
Mark earned his J.D. from St. Mary’s University School of Law. He also holds a B.S. and an M.S. from Texas A&M University. His education provided the foundation for his analytical skills, case preparation, and understanding of complex injury claims. This background allows him to evaluate evidence, explain client rights clearly, and build strong legal strategies for negotiations and litigation across Texas.
Over his career, Mark has helped individuals and families recover compensation after life-changing accidents. He represents clients injured in auto crashes, 18-wheeler collisions, motorcycle accidents, and incidents caused by unsafe property conditions. He also pursues claims against drunk drivers and defective product manufacturers. His approach centers on thorough investigation, strong advocacy, and clear communication, ensuring clients understand their options while he works to secure fair results through settlement or trial.
Mark VanCleave is admitted to practice in Texas and the U.S. District Court for the Northern District of Texas. He is an active member of the State Bar of Texas, Texas Trial Lawyers Association, Houston Trial Lawyers Association, Houston Bar Association, East Harris County Bar Association, Texas Aggie Bar Association, and the American Bar Association. Through his firm in Baytown, Mark serves clients throughout Houston and surrounding communities, providing dedicated legal guidance to those seeking justice after serious injuries.
Law Office Affiliations
- Founding Partner, Heintz Law
- Member, State Bar of Texas
- Member, Texas Trial Lawyers Association
- Member, Houston Trial Lawyers Association
- Member, Houston Bar Association
- Member, East Harris County Bar Association
- Member, Texas Aggie Bar Association
- Member, American Bar Association
Licensed State
- Texas
Education
- St. Mary’s University School of Law
Juris Doctor (JD) - Texas A&M University
Masters Degree - University of South Florida
Bachelor of Science (BS)
Awards & Badges

- Animal and Dog Bites
- Brain Injury
- Car Accidents
- Construction Accidents
- Motorcycle Accidents
- Slip & Fall Accidents
- Trucking Accidents
- Wrongful Death




