Guillermo Edgardo Vecchio (born March 9, 1961, in Buenos Aires, Argentina) is an Argentine professional basketball head coach.
Vecchio began his coaching career in Lanus, and then moved to the Argentine League club Obras Sanitarias, where he won the William Jones World Cup in 1983.
Then he came back to Argentina, where he won 2 TNA cups with Estudiantes Concordia and Regatas SN.
He also coached teams in Venezuela, Mexico, Chile, Cyprus, Saudi Arabia, Lebanon, and Bahrain.
He was also the head coach of four other national teams, Mexico, Venezuela, Panama, and Chile.