Family Law San Antonio: Lawyers and Paralegals | Tessmer Law Firm
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Tessmer Law Firm, P.L.L.C. is owned and operated by Heather Clement Tessmer, attorney at law. She has over 18 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 Lincoln 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 personal injury cases.

Board-Certified Family Law Attorney Heather Clement Tessmer

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.

Areas of Practice



  • 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


Certified Mediator

  • Basic mediation training
  • Family Law mediation training

Admitted to the Bar

  • 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

Associate Attorney Christine Rudy

Christine Rudy began working as a law clerk with Tessmer Law Firm, PLLC in March of 2015. She received her undergraduate degree at the University of Colorado, Denver in 2010 with a B.A. in Political Science and a minor in Law Studies. Christine then moved to California to pursue her life-long goal of becoming an attorney. After graduating from Western State College of Law in Fullerton, California in 2013 and becoming a member of the State Bar of California, Christine moved to San Antonio. She took the State Bar of Texas exam in the summer of 2015 and has since been sworn in as an attorney in the state of Texas.


Christine enjoys exploring all the character and charm San Antonio has to offer. She also enjoys cooking, working out and visiting her family in her free time.

Christine’s favorite thing about working for Tessmer Law Firm:

“The environment at Tessmer Law Firm has been warm and welcoming from the moment I joined this wonderful group of women. Everyone is passionate about the work they do and collaborates with one another to achieve the best possible results for our clients. I am grateful to be a part of such a stellar team.”

Associate Attorney Brittany Hinojosa

Brittany Hinojosa is a Texas native, originally from the Rio Grande Valley.  Brittany received a Bachelor of Arts in English from the University of Texas at San Antonio in 2011.  After graduation, she began working at Tessmer Law Firm and became a Certified Paralegal.  Brittany moved to Springfield, Massachusetts, in 2013 to attend Western New England University School of Law, where she received a Juris Doctor degree in 2016.  Brittany was admitted to the State Bar of Texas in November 2016 and is a member of various associations in San Antonio.

Brittany’s favorite thing about working for Tessmer Law Firm:

“Everyone at the firm genuinely cares for one another and for our clients.  I enjoy being part of a firm that is dedicated and passionate about the work we do, and a firm that continuously achieves in being the best advocates for our clients.”

Certified Paralegal Heidi Helstrom

Heidi Helstrom has been with Tessmer Law Firm, P.L.L.C. since May 2011.  Heidi received an Associate’s Degree in Paralegal Technology from an ABA approved program in Fayetteville, North Carolina.  She also completed the Paralegal Program at University of Texas San Antonio.  Heidi achieved her Paralegal Certification from the National Association of Legal Assistants in January of 2010.  Heidi was born in San Antonio but has lived all over the United States and Europe, including England and Italy. She has been living in San Antonio with her three daughters since 2001.  Heidi was chosen as Paralegal of the Year 2016, serves as the NALA Liaison for San Antonio Paralegal Association and is currently the first paralegal chosen to be on the Family Law Section of the SABA Board of Directors. She is also past President of the South Texas Organization of Paralegals. She has memberships in the National Association of Legal Assistants, State Bar of Texas Paralegal Division, Bexar County Women’s Bar Association, San Antonio Bar Association, Family Law Section of the SABA and the College of the State Bar of Texas.

Heidi’s favorite thing about working for Tessmer Law Firm:

“We are truly a family. I know that I can call on any one of my fellow employees at Tessmer Law Firm and they will come running. It’s very important to come to a job that you love and really care about the people you are working with.”

Billing Clerk Jacqueline Cisneros

Jacqueline Cisneros began working for Tessmer Law Firm in July 2014. Prior to this, Jacqueline worked in billing and collections for a major collision repair center. She is a San Antonio native and a devoted mother of two beautiful children.  When not working and caring for her family, Jacquie enjoys cooking, traveling, embracing all of the downtown San Antonio culture and rooting for the San Antonio Spurs.

Jacqueline’s favorite thing about working for Tessmer Law Firm:

“It is hard to pick just one thing I love about working for Tessmer Law Firm because there are so many. I love the family atmosphere fostered by my coworkers and how we extend that to our Clients. I look forward to coming to work every single day. I also love that I get to work with such strong and inspirational women!”

Legal Assistant and Receptionist Elaine Simons

Elaine Simons began working for Tessmer Law Firm in April, 2015.  She has an Associate’s Degree in Business Education.  Prior to joining our team, Elaine worked in Sales and Marketing for 24 years.  Currently, Elaine is working double duty as our Legal Assistant and our Receptionist.  Elaine was born in New Braunfels and is the proud mom of a college-bound son.   In her spare time, she has a pet-and-house sitting business, where she gets to enjoy one of her passions, her love for animals.  Elaine enjoys reading, going to the movies and taking road trips to explore out of the way places.

Elaine’s favorite thing about working for Tessmer Law Firm:

“From the moment I joined the team, I have felt like family. Not having a legal background, I have been fortunate to learn from the best in the field. Each person has taken me under her wing, helping to make me the best I can be. Everyone is very encouraging and we all pull for each other. Most importantly, we consider our Clients family. We take pride in what we do and want only the best for our Clients.”