Steven G. Marquez

Attorney at Thomas J. Henry Law's San Antonio Office

Mr. Steven G. Marquez is a veteran litigator with more than 15 years of experience, including nine years as owner and operator of his own law firm.

Prior to joining Thomas J. Henry in 2018, Mr. Marquez represented clients involved in a variety of legal matters, including civil litigation, personal injury, consumer law, business law, criminal law, and will and probate law. He also served eight years as a visiting professor for DeVry University, teaching Business Law and Ethics. As a litigation attorney with Thomas J. Henry, Mr. Marquez now focuses his practice on matters of personal injury, including automobile accidents, company vehicle accidents, product liability, premise liability, trucking accidents, and workplace injuries.

Beyond his work as an attorney, Mr. Marquez is the proud father of two young daughters and especially enjoys participating in swimming and gymnastics classes with them. He is a super-fan of FC Barcelona, a marathon and half-marathon runner, and enjoys traveling when time allows. Mr. Marquez is also a supporter of the Down Syndrome Association of South Texas, Dads Appreciating Down Syndrome (D.A.D.S.).



  • U.S. District Court for the Western District of Texas


  • State Bar of Texas


  • University of Notre Dame Law School, Notre Dame, Indiana
    • Dean’s Honor List
    • Hispanic Law Students Association, President
  • University of Texas, Austin, Texas
    • Pi Sigma Alpha, National Political Science Honor Society
    • Voter Registrar
    • John Ben Shepperd Public Leadership Institute


  • San Antonio Trial Lawyers Association (SATLA)


  • Spanish


At Thomas J. Henry, our guiding principle is to provide our clients with the best legal representation possible for their personal injury case. Our San Antonio personal injury attorneys fight diligently for their injured clients every day, striving to achieve the compensation they deserve. We greatly value our clients’ feedback — see what Steven Marquez’s clients had to say about their experience.

My father referred me and it was the best thing I did. Steven Marquez and his team kept in touch with me EVERY step of the way with all communication possible even during this pandemic. I didn’t know where to turn after my accident. Mr. Marquez led me down the straight path to an unbelievable outcome! I recommend no one else but these caring people. Thank you again, Mr. Marquez and THOMAS J. HENRY!!! — Juan Narvaez

Mr. Steven Marquez did an excellent job fighting for my wife. The other guy was trying to prevent her from getting anything even though he was at fault. Good job Mr. Marquez — Ruben Garcia

When I was about 6 months pregnant I was involved in a car accident. My life felt like I was in a movie, never thought it would happen to me. I worried more than ever praying my baby would survive and be healthy. I knew that I was in need of some of the best defensive Attorneys and that’s exactly what Thomas J. Henry Law is, the best! Steven Marquez and his team took care of me till the very end, always kept me in the loop about my case, and I’m very grateful. I definitely recommend them to all! — Jacqueline G.

I am so grateful to Mr. Steven Marquez for taking on my case and following through until the end. I truly appreciate his hard work!!! He was communicative and knowledgeable. I will definitely recommend him!!!! — Claudia Gonzalez

I have been so fortunate to have Steven Marquez and his team assigned to my case. They were all very professional and quick to respond to my never-ending questions and requests. I got frequent updates on my case and met with Steven Marquez several times along the way to make sure I felt comfortable with upcoming legal steps. Thank you, Steven Marquez, Barbara Unruh, and Victor Villa-Guillen for all you’ve done for me! — Lori Sanchez

We are very satisfied!! .Thank you Steven Marquez for helping us get through this. Not only are you a very professional attorney you are nice and considerate. Definitely if ever this situation happens again I know where to go. I recommend Steven Marquez with more than 5 stars. Beyond Great!!! Thank you. — Bridget Rubio

Happy with the results. Once Steve Marquez got on my case we got a swift settlement. Great people that are willing to help. Couldn’t recommend more! — Joel Munos

Thomas j Henry, a great law firm. We started out slow but when Steve Marquez took over things really started rolling. He kept in touch answered any questions. Very satisfied with end result steve did a great job. — Chris Villanueva

It was a pleasure to work with my attorney Mr. Steven Marquez, my wife and I are extremely happy with the outcome of our final settlement which could have been really bad if it weren’t for the hard work Mr. Marquez put in for us. Highly recommend Mr. Steven Marquez for a job well done. Thanks again Mr. Marquez for all your help and assistance throughout this entire process. — Vicente Hernandez

I am very glad that I chose the Law Offices of Thomas J. Henry and more importantly, I appreciate the great service that I received from my attorney, Mr. Steven Marquez. Mr. Marquez and his team kept me informed about my case, they were professional, empathetic, and very personable. They constantly checked in with me to make sure that I was doing okay and they genuinely cared about me and my well-being. If I ever need this type of legal representation again, I will certainly seek the professional assistance of the Law Offices of Thomas J. Henry and request that once again, I have the pleasure of working with Attorney Steven Marquez! I highly recommend this law firm and I would never go anywhere else. — Robert Gardner

Do not wait! If you have been injured in an accident, call Thomas J. Henry Law. We have San Antonio car accident attorneys and San Antonio 18-wheeler accident lawyers available 24/7, nights and weekends to assist you with your claim.

Black and white portrait photo of Thomas J. Henry Attorney Steven G. Marquez
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