Djemai began training in track and field in 1999 and eventually qualified for the Algerian Paralympic Team.
At the 2011 Pan Arab Games, Djemai earned a gold medal and later competed at the 2012 Summer Paralympics.
[1] Djemai competed in the 2013 IPC Athletics World Championships Men's 800 metres where he placed eighth.
[3] In 2016, Djemai won a bronze medal in men's 1500 metres T37 at the 2016 Summer Paralympics with a time of 4:17.28.
[4] The next year, he was selected to compete for Algeria at the 2017 World Para Athletics Championships,[5] where he won a bronze medal in the men's 1500m.