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Who We Are

Tessmer Law Firm, P.L.L.C. is owned and operated by Heather Clement Tessmer, attorney at law. She has over 20 years of experience practicing law. Heather graduated from St. Mary’s University Law School and began her career as an attorney in 1999. In 2001 she relocated with her family to San Angelo, Texas, where she opened her own office. In 2005, Heather moved back to the San Antonio area, opening her first office in Fair Oaks Ranch, Texas. Since 2005, Tessmer Law Firm has been continuously growing and is now headquartered at the Northwest Center building in San Antonio, Texas.

We have evolved into a “full-service” firm – assisting clients through every facet of legal representation in family law, estate planning and probate, disability, business formations and litigation, disability, employment issues, and general litigation.


Board-Certified Family Law Attorney Heather Clement Tessmer began her legal career in 1999 after graduating from St. Mary’s University School of Law. In 2001, Heather opened her own office and began accepting cases from a diverse clientele. In January of 2010, the office evolved into Tessmer Law Firm, PLLC. Heather continues to offer quality legal services to San Antonio and the surrounding Hill Country.
J.D., St. Mary’s University School of Law (1999) B.B.A, Angelo State University(1989) College of the State Bar of Texas – Maintaining at least 30 hours of CLEs since 2009
Adoption & Guardianship • Business & Charitable Organization • Child Custody • Child Support • Collaborative Divorce • Common Law, Prenup, Postnup, Same Sex • Divorce • Estate Planning & Probate • Military Divorce • Personal Injury
State Bar of Texas (1999) • Women in the Law, Family Law, Collaborative Law, Alternative Dispute Resolution, General Practice, • Federal Bar • Eastern District (March, 2010), Western District (December, 2010), Southern District (December, 2011), Northern District (January 2012)
San Antonio Bar Association • Bexar County Women’s Bar Association • Kendall County Bar Association • Fellows of the Texas Bar Foundation • St. Mary’s University School of Law Alumni • Alamo Area Mediators Association • Texas State Bar College

Right representation
right time

service with a smile

Meet Our Team

Our Team

The brightest legal gems in the industry.

Katherine Cabello-Flores

Senior Associate Attorney

Mariana Treviño

Senior Associate Attorney

Elaine Simons

Certified Paralegal Integrator

Jacqueline Cisneros

Financial Director

Eve Watts

Administrative Specialist

Marissa Edwards


Bailey Wideman

Law Clerk

Jordy Hernandez

Marketing Specialist

Avery Tucker

Law Clerk

David Dunn

Intake Specialist

Mary Silva

File Clerk

Jessica Garcia


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