 After World War I, Moulin resumed his studies and obtained a law degree in 1921.He then entered the prefectural administration as chief of staff to the deputy of Savoie in 1922 and then "sous-préfet" of Albertville from 1925 to 1930.After being rejected by Jeanette Auran, Moulin, aged 27, married a 19-year-old professional singer, Marguerite Cerruti, in the town of Betton-Bettonet in September 1926.