In 2004, Guillaume Poncelet founded the band Wise with Julien Birot and Robin Notte, who will release his first album at Naïve Jazz. In 2005, he directed Freddy’s album Mes Couleurs for the label Such. In 2006, he met Michel Jonasz for whom he will direct and arrange two albums: Chanson française and Les Hommes Sont Toujours Des Enfants. He will accompany him on stage as musical director, trumpet player and pianist until 2013. In 2009, he joined the National Jazz Orchestra conducted by Daniel Yvinec, playing the keyboards and trumpet, he will leave in 2011. In this project, he will participate in the recording of two albums.
He meets Benjamin Duterde in 2008, better known by his stage name Ben l’Oncle Soul, whose eponymous album he will release in February 2010. It will be released in the spring of the same year. For the label M6 Music, he also made Dave’s album entitled Blue Eyed Soul. In 2008, he meets Gaël Faye with whom he befriends. He collaborates with the duo Milk Coffee and Sugar, composed by Gaël Faye and Edgar Sekloka. He then directed Gael’s solo album, Pili Pili, on a Croissant au Beurre released in 2013 on the Motown France label. In 2013, he is touring with Ayo. In 2014, he devoted himself to the writing of his right piano solo album titled 88. In 2015, he is on the road with the singer Zaz. In 2016, he composed and directed the 5 pieces of EP by Gaël Faye, Rythmes & Botanique. In 2017, he accompanied Gaël Faye during his French tour and co-directed, with Marlon B, the new album of Ben Mazué. He gives the first concert related to his album 88 Studio Davout of Paris, surrounded for the occasion by Gaël Faye, Thomas Azier, Ben Mazué, Malvina Meinier, Christophe Panzani, Renaud Gensane and the ensemble Contraste, filmed by Loïc Guilpain. by guillaumeponcelet.fr