El-Hassen Ould Khalil Jouleibib (1981–2013) was a Mauritanian jihadist and lieutenant of Mokhtar Belmokhtar.

[1] He first tried to reach Iraq to fight American troops, but he met Mokhtar Belmokhtar with whom he became friends.

He joined the Katiba de les Enturbannés and in 2005 took part in the Lemgheity attack against the Mauritanian Army.

[1] Canadian diplomat Robert Fowler, who was held hostage by jihadists from December 2008 to April 2009, frequently met Jouleibib to whom he gave periodic English lessons.

Technically, he was the most sophisticated of our kidnappers (keeping up to date with reactions to our kidnapping in Canada), and along with Jack and Hassan, among the most dangerous”.