Paul Marshallsea was filmed yanking a six-foot- (1.8-meter-) long shark away from waders at Caloundra beach near Brisbane in January.
But his intervention also caught the eye of his employer, the Pant and Dowlais Boys & Girls Club, a Welsh charity. Marshallsea had been on leave since April after saying he was suffering from work-related stress.
Marshallsea told local news website WalesOnline he was unhappy at his treatment, adding that his doctor had advised him to take a vacation.
A man who answered the phone at the charity Wednesday said no one was immediately available for comment.