Guillermo Daniel Rivarola (born April 28, 1967 in Villa Huidobro, Argentina) is an Argentine former footballer and currently is the Technical Director of Komets-River Plate. He played as a defender for many clubs in Argentina and Mexico such as River Plate, San Lorenzo, Racing Club. He retired playing for Racing.

Rivarola won 3 Primera Division Argentina with River Plate and 1 with San Lorenzo. He had a short tenure in Mexico playing for Pachuca and for Monterrey. As manager he coached Racing Club and Olimpo. On June 4, 2009 he was named Manager of C.F. Pachuca where he won the 2009–10 CONCACAF Champions League.^[1] Later he was the Director of Pachuca Youth System Development.^[2]

On December 21, 2010 Guillermo Rivarola was named Manager of Sporting Cristal^[3] from Peruvian First Division League for the 2011 season. On March 20, 2011 he was involved in a bitter dispute with fellow Argentine manager Marcelo Trobbiani of Cienciano after protesting to the referee in order to get him sent off.^[4]

Accomplishments as River Plate Technical Secretary Copa Sudamerica 2014 Recopa Sudamerica 2014 Copa Libertadores de America 2015 Copa Suruga Bank 2015 Recopa Sudamerica 2015 Copa Argentina 2016 and 2017 Supercopa Argentina 2017