- DVM, Texas A&M University, College of Veterinary Medicine
- Small Animal Medicine & Surgery Internship, Louisiana State University
- Residency, The Ohio State University, College of Veterinary Medicine
- Diplomate American College of Veterinary Internal Medicine
- Founding member CTVSH
Dr. Sharon Theisen is one of the original founders of CTVSH. She grew up in the San Antonio area and traveled to Abilene Texas for undergraduate work at McMurry University. She graduated from Texas A&M Veterinary College in 1991 and completed a rotating internship at Louisiana State University. She then completed an Internal Medicine Residency at The Ohio State University. While completing her Residency at Ohio State, she was reunited with Dr. Beardsley, a class-mate from Veterinary School. Dr. Theisen and Dr. Beardsley convinced Dr. Kerpsack that Austin, Texas was the only place to be and the three moved here together in 1995. When not at work, Dr. Theisen can be found searching for the next great movie to watch.