It was during his tenure at Queen's that Wallace became highly regarded nationally (and internationally) as an extremely effective and efficient academic administrator. He was one of just three Canadians chosen to represent the country at the United Nations Conference for the establishment of an educational and cultural organization (ECO/CONF) held in London in November 1945. It was at this conference that the United Nations Educational, Scientific, and Educational Organization (UNESCO) was created. Additionally, Wallace received honorary degrees from twenty different universities.