He is a sports medicine and orthopedic surgeon, specializing in arthroscopy and reconstruction of the knee, shoulder, hip and elbow.
[1] In 1986, Lemak and his partner James Andrews founded the Alabama Sports Medicine and Orthopedic Center (ASMOC) as well as the American Sports Medicine Institute (ASMI) in Birmingham.
Lemak has played an integral role in sports medicine and arthroscopy research as a founder and member of the board of directors for the American Sports Medicine Institute (ASMI).
[citation needed] In 2001, Lemak founded the National Center for Sports Safety, a non-profit organization dedicated to promoting the importance of injury prevention and safety in youth sports.
Lemak serves as Medical Director for Major League Soccer, the PGA and the LPGA and formerly for NFL Europe.