Prior to his work in football, Leproux worked for the music recording label PolyGram before moving on to the French television service M6, where he was later named vice-chairman. While at M6, Leproux was the director of football club Bordeaux. In 2001, Leproux was installed as president of RTL, the popular nationwide commercial radio network owned by the RTL Group. In 2006, he was recruited to head the French site of Axel Springer AG and was tasked with creating an English version of the German magazine Bild. In September 2009, Leproux was named president of football club Paris Saint-Germain. In his first year of presidency, the club won the Coupe de France. It was during Leproux's presidency that the "Plan Leproux" was instituted, banning 13,000 Paris Saint-Germain supporters in an effort to pacify the Parc des Princes.
"PSG name new president". LFP. Ligue de Football Professionel. 10 September 2009. Archived from the original on 27 January 2013. Retrieved 11 September 2009. https://archive.today/20130127220148/http://www.ligue1.com/ligue1/lireArticle.asp?idArticle=14002 ↩