He won the Australian tennis championships in the men's singles in 1920 and 1923 and in the men's doubles in 1919, 1920 and 1923. In 1920 he won the singles final over Ronald Thomas 6: 3, 4: 6, 6: 8, 6: 1, 6: 3 and in 1923 O'Hara Wood defeated Bert St. John 6: 1, 6: 1, 6: 3 in the final .
On August 3, 1923, he married Meryl O'Hara Wood , also a successful Australian tennis player. His brother was the tennis player Arthur O'Hara Wood .