At age 18, John Mamann left for Canada and later on to the States (Miami, Florida) to pursue a musical career.

He released his own album Mister Joe with all materials composed by him with lyrics from Elodie Hesme, François Welgryn, Lionel Florence et Florian Gazan.

Mamann has also written to a number of artists including Johnny Hallyday (in two songs "Autoportrait" and "Devant toi"), for Florent Pagny, Natasha St-Pier, Luce, Jean-Roch, Havana Brown and others.

In 2011, he co-wrote and co-produced "Il nous faut", a big hit for French singer Elisa Tovati and Belgian The X Factor runner-up Tom Dice.

[1][2] He also co-composed with David Hallyday, Fred Château, Mathieu Mendès, Corneille, Shaka Ponk, Coyle Girelli and Stanislas, music for the 2013 French musical production Robin des Bois.