He's got a very left foot and good ball playing ability that could give us options but his English isn't exactly fantastic", Jackett told BBC Sport. "He actually reads and writes it better than he speaks it which suggests to me it won't be long before he picks up the language".
Sissoko was a free agent after being released by French Second Division side Creteil earlier this month, ending his nine-month association with the club. Previously with FC Drouais, Sissoko can play in midfield or attack and becomes the club's fourth permanent signing since arriving in League One last May.