Throughout the mid-1990s he was a member of the trio Thela with Rosy Parlane and Dean Roberts.
Mattin has collaborated with other artists including; Dion Workman, Taku Unami, Emma Hedditch, Margarida Garcia, Xabier Erkizia, Karin Schneider, Oren Ambarchi, Dean Roberts, Bruce Russell, Campbell Kneale, Tony Conrad, Taku Sugimoto, Matthew Bower, Philip Best, Drunkdriver, Ray Brassier and Junko.
Celine Dion | Céline Dion | Dion Boucicault | Stéphane Dion | Mark Dion | Dion Workman | Nanette Workman | Dion Woods | Dion | De Dion-Bouton | Hawksley Workman | Dion Nash | William Workman | Timothy Workman | Nancy Workman | Dion Neutra | Dion Gales | Dion and the Belmonts | Charles H. Workman | Celiné Dion | Workman-Temple family | W. D. Workman, Jr. | The Tale of the Priest and of His Workman Balda | That's the Way It Is (Celine Dion song) | Paul Workman | Leslie J. Workman | Léandre Dion | Jules-Albert, ''Comte'' de Dion | It's All Coming Back to Me Now#Céline Dion | I'm Alive (Celine Dion song) |
Sigma Editions is an independent record label founded in 1998 by Rosy Parlane and Dion Workman (both ex-members of Thela).