Moussa set a heptathlon best of 4651 points at the 2006 Asian Indoor Athletics Championships, but this was not enough to reach the podium. He also missed out on the medals at the 2006 Asian Games in Doha, as his score of 7445 points left him in fourth place behind Kim Kun-Woo. Despite the disappointment of failing to medal on home soil, he went on to have one of his most successful seasons in 2007. At the 2007 Asian Athletics Championships, he edged Iran's Hadi Sepehrzad out of first place in the final 1500 metres event to claim his second Asian title. He was the bronze medallist at the 2007 Military World Games and won his second gold medal of the year at the 2007 Pan Arab Games