His half brother was The Honourable Leycester Meares AC CMG QC, a judge of the Supreme Court of New South Wales.
[2] Meares attended Newington College (1919-1924)[3] and went up to the University of Sydney in 1925, graduating as a Bachelor of Medicine and Surgery with first-class honours in 1932.
From that time, he was a clinical lecturer at the University of Sydney and in 1954 was appointed Consultant Gynaecologist to The Cancer Council New South Wales.
In the same year he was elected President of the Australian Council of the Royal College of Obstetricians and Gynaecologists and held that position until 1970.
[2] During World War II, Meares attained the rank of lieutenant colonel, serving as commanding officer of the 7th Field Ambulance, and was mentioned in dispatches.