Guy is a gold and platinum award winning songwriter/producer and a 25+year veteran of the music industry.  He has written or produced music for artists such as Pat Benatar, The Tuesdays, and for film and television shows including Baywatch, Rocky IV, The Cobra, Lionheart, the LA Kings, Turner Broadcast Network and others.

Marshall also teaches and lectures at The Musicians’ Institute, The Los Angeles Music Academy, the Learning Annex, and The Songwriters’ Guild of America to name a few.   He has done A&R work for Taxi.com and been a guest teacher and panelist at their Road Rally.

Marshall and Cat Cohen have participated together in several pop music workshops.  Marshall has been a guest at Cat’s UCLA Extension songwriting classes. They were fellow instructors at the Musicians’ Institute.