Fickentscher was born in Nyon, and initially began his footballing career with local side FC Rolle before a move to the academy of FC Lausanne-Sport in 2000. After a stay of four years, German club SV Werder Bremen picked up the young goalkeeper where he would go on to feature for the under-19 team but could not really break into the reserves, only making two appearances for them. This prompted a move back to Switzerland for him as he joined then Swiss Challenge League team FC La Chaux-de-Fonds for the 2008-09 season before moving up to the Swiss Super League with FC Sion the following year. Since joining Sion, Fickentscher has only managed to play sparsely for the first-team, featuring far more for the reserves. In the summer of 2013 he decided to return to FC Lausanne-Sport in order to get more playing time, signing a contract that will keep him at the club for two seasons. Interestingly, he signed for Lausanne on a two year loan, allowing him to return to Sion in 2015 when his main competitor in goal Andris Vaņins will be out of contract at the club.