Borrello began coaching university teams between 1994 and 1995, before managing San Martín de Burzaco from 1996 to 1997. In 1997, he became an assistant coach for the Argentina women's national team. In June 1998, he became the head coach and technical director of the Argentina women's national teams. He helped the senior team qualify for their first FIFA Women's World Cup in 2003. Three years later, he led the team to their first major title, winning the 2006 South American Women's Football Championship as hosts. The success meant Argentina qualified for the 2007 FIFA Women's World Cup, as well as the 2008 Summer Olympics, the first Olympic appearance for the women's team. Borrello also coached the youth women's national teams, managing to qualify for the FIFA U-20 Women's World Cup in 2006, 2008 and 2012. He remained in the position until October 2012.