In 1844, Pecqueur became a regular contributor to the leading democratic newspaper, "La Réforme", edited by the left-wing republican Alexandre Ledru-Rollin. This gave him a wider platform for his ideas and put him in contact with other major republican socialist figures of the period, including the economist Louis Blanc. In 1848, Pecqueur supported the February Revolution. When Blanc became Minister of Labour in the new Provisional Government of the Second Republic, he set up the Luxembourg Commission on the question of 'the organisation of labour' and appointed Pecqueur to its panel. Among his colleagues at the Luxembourg Commission were the orthodox liberal economist Pierre Le Play and the Fourierist socialist Victor Considerant. Pecqueur and Considerant collaborated quite closely and tried unsuccessfully to introduce several reforms, such as collective bargaining and government funding for agricultural colonies, social housing and co-operative workshops. Pecqueur was also nominated to the position of assistant director of the Bibliothèque Nationale. Under the "nom de plume" 'Greppo', he published a popular book called "Catéchisme social" (1848) to popularise his ideas. He also maintained contact with republican communists like Jean-Jacques Pillot.