In 1947, at the age of 31, Blanchard joined the
International Refugee Organization, staying there until the organization ceased to exist in 1952, after which he aided in the formation of its successor agencies, the
International Organization for Migration and the
United Nations High Commissioner for Refugees. In 1951, Blanchard joined the
International Labour Organization as deputy chief of the Manpower Division, involved with cooperation activities in vocational training and manpower. In 1956, then-Director-General
David A. Morse appointed Blanchard to the position of Assistant Director-General. In 1968, Blanchard was appointed Deputy Director-General with responsibility for technical cooperation and field activities. In 1973, he was appointed Director-General of the International Labour Organization. During his tenure as Director-General, the ILO saw the withdrawal of the United States from the Organization between 1977 and 1980, an action which led to the loss of a quarter of the Organization's budget. In 1989, Blanchard retired from the ILO, ending 38 years of service to the Organization and making him the second longest-serving Director-General in the Organization's history. As Director-General, he was preceded by
C. Wilfred Jenks and succeeded by
Michel Hansenne. After his retirement, Blanchard made occasional appearances at International Labour Organization events before dying at the age of 93 on 9 December 2009. ==Honours==