Jack Sigman
Senior Counsel
John M. "Jack" Sigman has been practicing professionally for 35 years. He worked at Castagna Scott, PLLC from October 2022 to December 2025. Jack defended clients in personal injury, automobile accident, premises liability, and trucking accident claims. From 2019 to 2022, Jack worked at the construction litigation firm of Gerstle Snelson, LLP, representing contractors and subcontractors. From 1997 to 2019, Jack was in private practice at Sigman and Sigman, LLP with his wife, Pam. His areas of practice included commercial litigation, general litigation, CPS, family, and juvenile law litigation. Jack's legal career started at the Austin civil defense firm of Wilson, Grosenheider, and Burns.
Jack has tried over 20 jury trials, 350 bench trials, and over 200 administrative hearings. In October 2020, Jack became a member of the American Board of Trial Advocates (ABOTA). He is a founding member and life fellow of the Austin Bar Foundation, a member of the Austin Bar Association, and a former director of the Austin Bar Association’s Civil Litigation Section.
Jack is licensed in all four Texas Federal District Courts. Jack also completed his mediator training in 2022. Jack is a former Northwest Austin Little League (NWLL) President and board member of the Northwest Austin Youth Basketball Association (NWAYBA). Jack received his undergraduate degree from the University of Texas and Juris Doctorate from Texas Tech University.
Jack and Pam are parents to two sons, Jackson and Walker.