Jones will be taking over Saint-Andre's work as soon as the Frenchman leaves.
Jones had already been ready to take over at the end of the season, but Sale want to promote him while Saint-Andre is still part of the club.
Sale hooker Sebastien Bruno is following in the footsteps of Saint-Andre by also joining Toulon.
Saint-Andre had been rumoured to be joining other rugby teams in France, but he has chosen Toulon, where he will become the new director of sport.
Toulon are currently second from bottom in France's Top 14 league so it will present Saint-Andre with a challenge to see if he can improve his new club’s ratings.
