Teaching is also a very important part of his work. From 2008 to 2019 Guillermo taught Improvisation,Chord Melody and Music Theory at the ITMC (Technological Institute of Contemporary Music), the first College of Music in Argenti-na. He also conducts clinics and guitar workshops during concert tours which are used as part of festival activities.

He is a columnist at the music industry magazine "Todo Guitarra y Bajo", an online magazine published in Argentina and Latin America, and since 2021, he's covering all NAMM SHOW events for South America.

He has written four educational teaching books for guitar, "Swing Time", "Chord Melody Solos", "Modal Improvisation" and "Tango Guitar Method"

"With a career spanning decades, Guillermo Marigliano's expertise shines through, making this guide a valuable companion for anyone seeking to express themselves through the art of TangoMethod" Natalie Soine for Readers' Favorite

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