Arnaldo Adolfo Sialle (born 21 November 1965) is a retired football defender who played in the Argentine Primera División and the Mexican Primera División and a football manager.
Born in Rosario, Santa Fe, Sialle began playing professional football with Newell's Old Boys in the Primera División.
In 1989, Sialle moved to Mexico where he played two seasons with Deportivo Irapuato.
He was an assistant to Belgrano de Córdoba manager Dalcio Giovagnoli during 2008 and 2009.
Sialle also managed lower-division side Guillermo Brown de Puerto Madryn, leading the club to promotion from the Torneo Argentino A as the 2010–11 season champions.