Melissa Osio Martinez

Melissa Osio Martinez is the managing partner of WSHB's Rio Grande Valley office. She is an experienced trial attorney with a distinguished career representing some of the largest companies in Texas. She is well-regarded for her vigorous representation of construction, transportation, business, insurance, and Fortune 500 companies. Melissa is also sought after for her significant experience representing defendants against serious bodily claims, wrongful death, professional liability, general negligence, and business-related contractual disputes from inception to resolution through negotiated settlements or trial.

Melissa was born in Bryan, Texas and raised in the Rio Grande Valley. Following in her aunt’s footsteps as the first female Hispanic graduate of Texas A&M University, Melissa continued the family legacy graduating as an Aggie. She then attended Texas Southern University Thurgood Marshall School of Law where she served in leadership and interned for the First Court of Appeals in Houston. Melissa’s legal career began under the guidance of now Former Thirteenth Court of Appeals’ Chief Justice Dori Contreras Garza and as an Assistant District Attorney for Hidalgo County prosecuting hundreds of misdemeanor and felony cases. For over ten years, Melissa practiced as a senior trial attorney for a top Fortune 100 company where she earned distinctions such as Rookie of the Year, Best Trial Win Percentage, and Best Disposition Ratio in Texas. She later held the best nationwide disposition ratio at the 18th largest Latino-owned financial services company.

Melissa is deeply involved in the RGV community where she is raising her children. She serves on the McAllen Performing Arts and Convention Center Board, Leaders in Education Assembly for the District of McAllen, and as a Junior League McAllen Sustainer. Her service on professional boards currently includes Chair for the State Bar of Texas Diversity in the Profession Committee, District #15 Director for the Texas Association of Defense Counsel, and the Alumni Advisory Board of her law school.

Newsroom

News

•Grounded and Credible: Preparing Anxious Witnesses for Deposition and Trial
Article, 9.17.25
•Trial Lawyer Melissa Osio Martinez Leads Rio Grande Valley Office
Firm News, 5.1.24

Events, Seminars & Speaking Engagements

•WSHB Partner to Present at Texas State Bar Program on Truck and Auto Collision Cases
Speaking Engagement, Boerne, TX, 11.21.24

Publications

•Supreme Court Expands Exposure for Freight Brokers in Negligent-Hiring Suits
Case Updates, 5.22.26
•When "Good Cause" is Actually Good Cause: The Texas Supreme Court Reins in Rigid Expert Exclusion
Case Updates, 5.4.26
•Texas Court Revives Construction Defect Claims: Key Lessons for Managing Latent Defect Risk
Article, 12.8.25
•Texas Supreme Court Reverses $100 Million Verdict: No Liability for Werner Absent Proximate Cause by Driver
Case Updates, 7.21.25

Community Activities

•McAllen Performing Arts and Convention Center Board
•Leaders in Education Assembly for the District of McAllen
•Junior League of McAllen Sustainer

In the News

•Supreme Court Expands Exposure for Freight Brokers in Negligent-Hiring Suits
•When "Good Cause" is Actually Good Cause: The Texas Supreme Court Reins in Rigid Expert Exclusion
•Texas Court Revives Construction Defect Claims: Key Lessons for Managing Latent Defect Risk
•Grounded and Credible: Preparing Anxious Witnesses for Deposition and Trial