Eighty years of giving back 12/06/2024 FacebookTwitterEmail David, 91, has been serving with St John Ambulance SA for 80 years and is the longest serving volunteer for the charity in the world. Photo: supplied, 412719_01. Kaitlyn Gibbons Murray Bridge resident David Heard has celebrated 80 years of dedicated service to St John - the longest serving St […] Subscribe or Login to see the rest of the content. Username Password Remember Me Forgot Password