[1] He moved to Dunkirk and began teaching at Lycée Jean-Bart in the late 1950s.
Prouvoyeur was named deputy mayor of the commune in charge of finance in 1965, and assumed the mayoralty upon the death of Paul Asseman [fr].
[2] While the mayor of Dunkirk, Prouvoyeur concurrently served in multiple positions on the Nord regional council.
He was elected to the Senate in 1983 as a representative for Nord, yielding the mayorship of Dunkirk to Michel Delebarre in 1989.
[3] Prouvoyeur left the Senate in 1992, and died at the age of 91 on 17 January 2018.