|Date of birth||27 June 1971|
|Place of birth||Veysonnaz, Switzerland|
|Height||1.80 m (5 ft 11 in)|
|2010–2012||Servette (head of youth)|
|2014–2017||FC Sion (technical director)|
|2014||FC Sion (U18)|
|2015||FC Sion II (caretaker)|
|2016||FC Sion II (caretaker)|
|* Senior club appearances and goals counted for the domestic league only|
Fournier worked as a chief executive at Servette from 2006 to 2009. After this role, he was appointed as the new manager of the club's U21 squad. He got a double role in 2010, where he also was appointed as the headleader of the club's youth academy.
In June 2012, one week after his graduation from the UEFA Pro Licence, it was announced that Fournier would join FC Sion as manager in summer 2012. This marks the return to his childhood club and is linked with high expectations, even though it is his first station as a professional manager. He won the selection over Michel Decastel, because the club owner Christian Constantin wanted to have a young coach, after he was impressed with the achievements by Roberto Di Matteo, Pep Guardiola, André Villas-Boas and Murat Yakin. He was sacked as manager of Sion on 4 September 2012 due to a bad relationship between him and the squad.
In March 2014, Fournier got the role as technical director of the club. Later in 2014, Fournier was hired as U18 manager. So he had a double role. He was also appointed as caretaker for the U21 reserve team from September 2015 to the new year. And once again in April 2016.
- "Sebastién Fournier" (in German). fussballdaten.de. Retrieved 15 May 2011.
- "Sébastien Fournier". National Football Teams. Benjamin Strack-Zimmerman.
- Sébastien Fournier – FIFA competition record
- Présentation du Team-Genève-Servette-Carouge M21, nouvelle équipe de 2ème ligue‚ proxifoot.ch, 23 November 2009
- Le Servette FC a nommé Sébastien Fournier comme directeur de l'Académie du Servette Football Club‚ rts.ch, 28 May 2010
- "Sébastien Fournier démissionne, Michel Decastel le remplace au FC Sion" (in French). RTS Sport. 4 September 2012. Retrieved 4 September 2012.
- Fournier nouvel entraîneur du Servette FC: les premières déclarations‚ tdg.ch, 13 September 2012
- Football: Sébastien Fournier viré!, tdg.ch, 20 August 2013
- "Servette feuert Sébastien Fournier" (in German). fussball.ch. 20 August 2013. Retrieved 20 October 2013.
- «Servette n’a rien à faire dans cette ligue», 14 September 2015
- Deshalb trete ich zurück!‚ blick.ch, 29 September 2014
- De Carouge à Servette: pour Thierry Cotting c’est renversant‚ tdg.ch, 6 November 2015
- FC Sion II: Sébastien Fournier remplace Bruno Pascale‚ lenouvelliste.ch, 11 April 2016
- Sébastien Fournier de retour aux commandes du FC Sion‚ canal9.ch, 25 April 2017