After the royalist insurrection of 13 Vendémiaire, he was elected to the short-lived Commission of Five, charged with bringing forward measures of public safety against the royalists. On October 15, 1795 Roux was elected to the Council of Five Hundred by the Ardennes and Nord. He sat for the duration of the Directory and was a loyal supporter of the regime. Apart from his elected positions, in 1799 he worked at the Ministry of the Interior under Nicolas Marie Quinette and after 18th Brumaire he joined the Commission on Emigrés. From 1800 to 1802 Joseph Fouché employed him as director of the archives of the Ministry of Police. Unemployed after Fouché's resignation, in 1804 he became a tax collector in Dinant in the department of Sambre-et-Meuse.