After retiring at Hannover 96, Ismaël became manager of the German outfit’s second team prior to successful spells with FC Nürnberg and VfL Wolfsburg.
He then took charge of Greek side Apollon Smyrnis before taking the reins at LASK, leading the Austrian side to a first-ever appearance in the UEFA Champions League play-offs and a debut in the UEFA Europa League group stage, making it to the round of 16.
Ismaël took up the chance to manage in England when joining Barnsley in October 2020. Just outside the Sky Bet Championship relegation zone when he arrived, the Tykes stormed up the table to finish fifth - only missing out on promotion in the play-offs.
After furthering his domestic experience at West Bromwich Albion during the 2021/22 campaign, Ismaël’s most recent appointment came at Turkish giants Beşiktaş.