As a young man, he wrote poetry, dedicating some verses to the exiled Henri, Count of Chambord, pretender to the French throne.

He was made chairman of the board of directors of the Société générale pour le développement du commerce et de l'industrie.

[1] For his monetary assistance to Prince Louis Napoleon while the latter was president, Le Roux was chosen on 29 February 1852, as the government candidate for the legislature in the 2nd district of the Vendée.

He was elected and joined the majority who voted for the restoration of the Second French Empire, and he was constantly in favor of Napoleon's dynastic rights.

[1] Le Roux was appointed Minister of Agriculture and Commerce on 14 July 1869, in a cabinet charged with modifying the imperial constitution.