He was still studying in 1944, when the liberation of France occurred, when he began working in administration for the local police department.
He remained there until 1963, but from 1953 to 1959 also served again as general secretary of the regional union of public and health staff.
He then began working in administration for the City of Paris, but remained active in the CGT and helped found the General Union of Engineers and Managers.
In 1968, he was additionally elected as president of the Trade Union International of Public and Allied Employees, and from 1969 he served on the executive of the CGT.
He left trade unionism in 1985, and became the director of a mutual insurance organisation in Paris, later serving as its president.