Shea came to work for Dr. Gast in September of 1999. He is a 1998 graduate of Sparks School of Radiography and of CARTI – Central Arkansas Radiation Therapy Institute School of Radiation Therapy.
In 2000, Shea was registered through the American Registry of Radiologic Technologists as a Radiation Therapist, and he has been a member of the ASRT – American Society of Radiologic Technologists since 2000.

Shea is licensed through the Arkansas Health Department in Radiation Therapy.
In addition to being the senior radiation therapist he also performs the duties of back-up dosimetrist.