[2] In 2008, Boualem Charef signed with the new promoted USM El Harrach and one of his most prominent ambitions is to rely on training, and he was behind the brilliance of several players most notably Baghdad Bounedjah.

The LFP Disciplinary Committee imposed a six month suspension on Charef for unsportsmanlike behavior towards officials during the match against MC El Eulma.

[3] In the 2012–13 season, Charef competed strongly for the league title until the last round and lost by two points to ES Setif, which is his best result since the beginning of his training career.

On 14 September 2013 Boualem Charef resigned after the home defeat against USM Alger the 4th consecutive since the start of the Ligue Professionnelle 1, this departure is the end of five years with yellow and black which is an exception in Algerian football, and tangible tension appeared between him and President Mohamed Laib, especially because of Bounedjah’s transfer.

[5] On 4 August 2022 USM Alger contracted with Boualem Charef to be the new coach with his staff Mustapha Amellal (first assistant), Mohamed Haniched (goalkeeping coach) and Moufdi Cherdoud (physical trainer), Charef had previously been in post at CR Belouizdad for three and a half years in charge of training development.