Born in Juvisy-sur-Orge, Essonne, Sissoko joined Olympique Noisy-le-Sec in 1996, moving on to CS Louhans-Cuiseaux in the 1997 close season.
He was released at the end of the season and returned to England, joining Torquay United on trial, signing on a free transfer in July 2000.
His Torquay debut came on 12 August 2000, a 2–0 defeat away to Kidderminster Harriers, with his first goal coming two weeks later in a 3–2 win home to Blackpool.
On leaving Nîmes he still had a three match suspension in place, but played in the first three games for Brest after his move, against AS Cannes, US Raon-l'Étape and Libourne-Saint-Seurin.
However, the French Football Federation rejected the appeal and allowed the results to stand, confirming Brest's promotion to League 2 instead of Cannes, who Sissoko subsequently joined in 2004.