APC ( Ghardaia )
Bechtel (Hassi messaoud, Hassi R'mel )
Sté:Bentini ( Hassi R'mAel )
Centre de Formation Professionnelle ( Ghardaia )
ENAC ( Ghardaia )
ENAFOR ( Hassi Messaoud )
ENGCB ( Hassi R'mel )
ENGTP ( Hassi R'mel )
EPEG ( Ghardaia )
Etterkib ( Hassi R'mel )
Sté: GEPCO ( Hassi Messaoud, Hassi R'mel )
NAFTAL DISTRICT ( Ghardaia )
SARPI ( Hassi Messaoud, Hassi R'mel )
SNC LAVALIN Sté: Canadienne ( Hassi Messaoud, Hassi R'mel )
SONATRACH ( OUED NOUMER, Hassi R'mel )
SONELGAZ ( Hassi R'mel)