He was captain of the New Zealand ski team in the 1952 Winter Olympics, the first Winter Olympics that New Zealand entered; though as he was injured he did not compete.
He worked as a chartered accountant after the war, and was the Executive Director of McKenzies (NZ) Ltd from 1949 to 1970. He also served as a director for several other companies.[1]
From 1955 he was the principal at the Roydon Lodge horse stud, and he bred, trained and raced many leading horses, including Roydon Glen, Sundon, Game Pride, Smooth Fella, Scottish Command, Jay Ar, Bonnie Frost, Captain Adios, Castleton's Pride and Garcon Roux.[2]
From 1947 to 1993, McKenzie was on the Board of the J R McKenzie Trust, which had been established by his father in 1940 to distribute a proportion of the profits from his businesses for the benefit of the people of New Zealand. For 23 years, McKenzie chaired the Trust. He set up two other grant-making bodies: the McKenzie Education Foundation and the Roy McKenzie Foundation.
McKenzie was also patron of the Outward Bound Trust, and a councillor at the Council for Educational Research. In 1978 McKenzie helped found New Zealand's first hospice, Te Omanga.[3] He also was a benefactor and founding patron of the Seabrook McKenzie Centre, which assists people with specific learning difficulties and their families.[4] In 1990 he played a major role in setting up Philanthropy New Zealand, which was a regular meeting of charitable groups in New Zealand.[5]