Info
| Last name | Demarbaix |
| First name | Sebastien |
| Nationality |  Belgium |
| Date of birth | 19-12-1973 |
| Age | 52 |
| Place of birth | Lessines |
Monuments
| Date | Rank | Race | |||||
|---|---|---|---|---|---|---|---|
| 06-09 | 9 | Grote Prijs Jef Scherens (1.4) | |||||
 Tour de l'Ain (2.5) | |||||||
| 7 |  Standings | ||||||
| 16-08 | Stage 5bJasseron - Bourg-en-Bresse (18.0km) | ||||||
| 13-08 | 5 | Stage 2Thoissey - Arbent (160.0km) | |||||
| 12-08 | 5 | Stage 1Bourg-en-Bresse - Saint-Didier-sur-Chalaronne (166.0km) | |||||
| Tour de la Région Wallonne (2.4) | |||||||
| 8 | Standings | ||||||
| 05-08 | Stage 6Saint-Hubert - Houffalize (187.0km) | ||||||
| 15-04 | 99 | La Flèche Wallonne (1.1) | |||||
| 08-04 | 138 | Gent-Wevelgem (1.1) | |||||
| 29-03 | 30 | De Brabantse Pijl (1.1) | |||||
| 28-03 | 59 | E3 Prijs Harelbeke (1.1) | |||||
| 25-03 | 65 | Dwars door België (1.2) | |||||
| 28-02 | 62 | Omloop Het Volk (1.1) | |||||
Teams
Staff
Rider
| Year | Team |
|---|---|
| 2002 | Ag2r Prévoyance |
| 2001 | Ag2r Prévoyance - Décathlon |
| 2000 | Lotto - Adecco |
| 1999 | Lotto - Mobistar |
| 1998 | Home Market - Ville de Charleroi |
| 1997 | Lotto - Mobistar - Isoglass |
| 1996 | Lotto - Isoglass |
| 1994 | Lotto |
Victories
| This year | 0 |
| Total | 0 |