Walter Montillo

San Lorenzo

He began in the youth ranks of Argentine club San Lorenzo and his professional debut came in 2002. In 2006, he moved to Mexican side Monarcas Morelia. He was a fixture in the starting line-up for the Mexican club. He returned to San Lorenzo in 2007, but did not find regularity with the first team, only playing six games. In 2008, he was sold to Universidad de Chile for $1 million and signed a five-year contract with the club. At the time the price tag was the most ever paid by a Chilean club. However, since the move, Colo-Colo paid $1.2 million for Domingo Salcedo and then paid $2.2 for Macnelly Torres.

Universidad de Chile

Actuating at Universidad de Chile, he started gaining a reputation, managed by Sergio Markarián. In the 2010 Copa Libertadores, he obtained visibility in Brazil, after appearances in the matches against Flamengo, scoring a goal in the second match. Although losing it, they won over Flamengo by away goal. During the competition, Montillo dedicated his goals to his newborn baby Santino, who has Down syndrome; he grew visibly emotional after the crowd then chanted in support of Santino. During the campaign in La U into Libertadores, Montillo became harassed in many Brazilian teams, including Flamengo and Vasco da Gama, but the one who really did get the Argentinean midfielder was Cruzeiro; even though his contract renew with Universidad de Chile until 2014, after rejecting the Flamengo's offer. His hiring at the Celeste squad…

He played for Argentina U20 in the 2003 FIFA World Youth Championship in United Arab Emirates. He played in most of the team's games. In September 2011, he was called up to the full side by Alejandro Sabella, wearing the number 7 shirt in the second match against Brazil in the mini-tournament "Superclássico das Américas", in which only players who were playing in South America could be selected. Although his team lost 2–0, Montillo was profusely praised by the Argentinian media. He was again called up to represent Argentina in the friendly match against Brazil in November 2012. He made his first official competitive appearance for the national team against Venezuela in a World Cup qualification match on 22 March 2013. His performance in this game was praised by Muricy Ramalho, the coach of Montillo's club Santos. According to Ramalho, the Argentine "did very well. He is improving step by step." On 7 June 2013 against Colombia he was one of the starting eleven, as Lionel Messi had only just returned from a hamstring injury.

Club

International appearances and goals

His eldest son, Valentín, is a Chilean-born footballer from the Escuela de Fútbol Madrid Oeste Boadilla (E.F.M.O. Boadilla). In 2026, he joined the Universidad de Chile under-18 team.