Medero started his career in 1992 with Argentine giants Boca Juniors, at the club he won two titles, the Apertura 1992 championship and the Copa Nicolas Leoz. He made a total of 84 appearances for the club in all competitions, scoring 1 goal.
In 1996, he was transferred to Colón de Santa Fe where he played for 5 years.
This biographical article related to association football in Argentina, about a defender born in the 1970s, is a stub. You can help Wikipedia by expanding it.