He attended the University of Manitoba in 1947 but was later expelled.
Hendry served as head manager for Management and Training Corporation until 1963. Hendry was also a playwright and television writer, including for the Canadian Broadcasting Company Television series King of Kensington. His plays included How Are Things With the Walking Wounded? (1970), The Missionary Position (1971), Fifteen Miles of Broken Glass, Gravediggers of 1942 and Satyricon.