Seigneur could in his career, a stage of the Tour de France win. Prestigious final section on the Avenue des Champs- Élysées in 1994 Seigneur was known primarily as a four-time French national time trial champion. Both his four wins and that three of them went in series, are of French record. In addition, he could even win the French championship titles in the road race.
- Tour de France 1994: stage 21
- Four Days of Dunkirk: 1995
- Tour du Poitou -Charentes: 1996
- French road champion: 1995
- French time trial champion: 1996, 2002 to 2004