His debut as a manager occurred in July 2006, and it could not have been any better as Wilstermann won the 2006 Segundo Torneo league championship on December 3 of that year under his lead. During 2007 while managing Real Potosí, Soria won his second league title as he secured the 2007-Apertura for the lilas. He also had a short spell with the Bolivia national team as the manager participating in Copa America 2015 held in Chile. He was waived by the Bolivian Football Federation at the conclusion of the tournament and appointed Julio César Baldivieso in his place.
