He also realizes numerous collaborations with the theater, Hubert Colas, Jean-Claude Berutti, Peter Palitzsch..., the dance, Odile Duboc, Skalen collective, and the visual arts, Piotr Klemensiewicz, Sandy Amério, Lionel Scoccimaro, Richard Baquié...and image, Laure Verluise, Salvo Cuccia, José Cesarini... He performs solo and in various formations, AMP (Guitar Trio, Akchoté / Montera / Pauvros), The Room (Duo with Sophie Gonthier), Meditrio (with medieval musicians Julien Ferrando - clavicytherium / Jean-Michel Robert - theorbo and electronics), The Invisible Ensemble (with Famoudou Don Moyé of the Art Ensemble of Chicago, Paul Elwood, Emmanuel Cremer, Simon Sieger, Thomas Weirich). He founded the Ensemble d'Improvisateurs Européens with Hans Koch, Thomas Lehn, Hélène Breschand, Dan Vandewalle, Lelio Giannetto, Chris Cutler and Taavi Kerikmaé. The ensemble specializes in the interpretation of graphic scores by 20th century composers (Cardew, John Cage, Earl Brown...) and commissions from contemporary composers (Pierre-Yves Macé and Annette Schlünz). He has also collaborated with Fred Frith, André Jaume, Barre Phillips, Pascal Contet, Gérard Siracusa, Floros Floridis, Paul Lovens, Thruston Moore, Lee Ranaldo, Louis Sclavis, Carlos Zingaro, Pauline Oliveros, Christian Wolff... He has been invited for two exceptional concerts with Sonic Youth (La Villette-Paris 2007) and Patti Smith (Fondation Cartier - Paris 2009). With about thirty albums in different bands, his first solo album, Hang Around Shouts, was released in 1995 on the FMP label (Free Music Production). 

In 2011, he released Les Anges du Péché alongside Lee Ranaldo and Thruston Moore, the guitarists of Sonic Youth, then in 2012 the box set 13 Impros with Fanny Paccoud around thirteen painters from Marseille. In October 2013, What's Up? was released around the women poets of the Beat Generation, on the Signatures label (Radio France). Jean-Marc Montera is the co-founder of GRIM (Groupe de Recherche et d'Improvisation Musicales) in 1978. In 1999, he joined forces with the author and director Hubert Colas to found Montévidéo, a center for contemporary creations in Marseille. The vocation of this center is to create bridges, to establish an interactivity between music and theater in their most current forms and to multiply the confrontations between artists and disciplines. In 2017 he created the D.R.I.M research department for improvised music within the GMEM of which he became the associate artist.