Dan Mongrain (also known as Daniel Mongrain and Chewy) is a co-founder of the Quebec technical metal band Martyr. He composes, sings and plays lead and rhythm guitar. Dan Mongrain also plays guitar and backing vocals and composes as a member for the Canadian thrash/progressive metal band Voivod since 2008, replacing late guitarist Denis D'Amour.
Mongrain was a session and touring guitarist for the Canadian metal bands Cryptopsy (2005), Gorguts (2000), Alcoholica (2004) and Capharnaum (2003).
In addition to the metal genre, Dan Mongrain plays guitar with several Quebec artists including Dan Bigras, Breen Leboeuf, Bruno Pelletier for the musical Dracula - Entre l'amour et la mort among others and played with more than 80 different formations, bands in numerous genres from Blues to rock to hip-hop to prog to metal, etc. His latest cover band project is a tribute band to progressive music from the 1970s called Jurassik Rock.
Dan Mongrain has a bachelor's degree in Jazz-Interpretation at University of Montreal and teaches jazz and pop guitar and theory courses at the Cégep régional de Lanaudière, Joliette Campus.
Mongrain is vegetarian.