Guillermo Klein (born 1969) is an Argentine pianist and composer.
[1] He graduated from Berklee College of Music in 1994, and throughout the 1990s held a residency at Smalls, a jazz club in New York City.
Known for his highly original harmonic and stylistic concepts, Klein has garnered much respect from the jazz community.
[2] Klein has made yearly appearances with his band, Los Guachos, at the Village Vanguard since 2007.
[3] In 2008, he was a member of the jazz faculty at Musikene (Centro Superior de Música del País Vasco), the Higher School of Music of the Basque Country, in San Sebastián.