Fomen began his professional career in 2007 with Mount Cameroon FC, moving in the following year to Panthère de Bangangté.
[3] On 17 April 2009, he had his first abroad experience, signing with French club Olympique de Marseille, who had already scouted the player.
[5] On 3 August 2011, Fomen moved to Ligue 2 side Clermont Foot on free transfer.
[7] Fomen signed a two-year contract with French Championnat National side Red Star in July 2017.
[8] Fomen earned his first call-up for the U-17 of Cameroon on 27 July 2006, being summoned for a training camp in his hometown of Buea.