About Douglas Gerard
Douglas Gerard Deffenbaugh is a attorney based in San Antonio, Texas, specializing in estate planning, probate, real estate law, and tax law. He is the managing member of Deffenbaugh & Lange, P.L.L.C., a firm he co-founded in 2004 with his daughter, Lisette C. Lange. The firm is located at 14350 Northbrook Dr, Suite 200, San Antonio, TX 78232, and offers comprehensive legal services to clients across these practice areas. This partnership reflects a commitment to providing personalized legal solutions tailored to individual client needs. Mr. Deffenbaugh's educational background is extensive and impressive. He earned his Bachelor of Business Administration from St.
Mary's University in 1975, graduating summa cum laude, which highlights his academic excellence. In 1977, he became a Certified Public Accountant, further solidifying his expertise in financial matters. His pursuit of knowledge continued, culminating in a Master of Business Administration from the University of Texas at San Antonio in 1982. He later achieved his Juris Doctor from St. Mary's University School of Law in 1992, marking the transition from business to law. Before entering the legal field, Mr. Deffenbaugh built a robust career in business and accounting. He began as a CPA with the Big Eight accounting firm Peat, Marwick & Mitchell in 1977.
In 1981, he shifted his focus to the energy sector, specifically in the pipeline segment. By 1986, he founded a natural gas service company that operated across three states. For approximately 25 years, he managed this enterprise before selling it to dedicate himself to his legal practice, bringing a wealth of practical experience to his clients. In his legal career, Mr. Deffenbaugh has handled a diverse range of cases, including contracts, probate, taxation, insurance, real estate, oil and gas, business startups, and credit unions. His multifaceted expertise allows him to navigate complex legal issues effectively. He has also served as an expert witness in business valuations in numerous trials, leveraging his combined experience as an entrepreneur, attorney, and CPA to provide valuable insights. Beyond his professional achievements, Mr.
Deffenbaugh is deeply committed to the San Antonio community. He has served on the Advisory Board at Randolph-Brooks Federal Credit Union and participated in various parish committees. His involvement with the school board for Antonian College Preparatory High School shows his dedication to education. Additionally, he has held leadership roles in the Knights of Columbus and has been active as a St. Padre Pio Prayer Group leader and an ACTS team member. He is a member of the Catholic Lawyers Guild, the San Antonio Bar Association, and the San Antonio Bankruptcy Bar Association, reflecting his commitment to both his profession and community service.
