Annab signed a contract with Westerlo in April 2008, while he was playing for Eisden Sport in Limburg Third Division, the 7th of 8 levels in the Belgian football league system. Annab also played futsal for ZVK Eisden Dorp at that moment, but quit after his surprise transfer. Lens Annab made his debut at the highest level in a 0-1 victory against Mouscron on 12 September 2009 and from then on featured regularly in the team. Following the relegation of Westerlo in 2012, Annab chose to accept an offer from ES Sétif, allowing him to move to his second home country, Algeria. On 5 August 2014 Lens Annab signs a contract with second division team ASV Geel.