OCI and Besix, which operates in much of the region under the name of Six Construct, are two of the most active contractors in the Middle East. The two companies have also worked closely together in Egypt on a range of major projects, including the Nile City complex, the Conrad hotel and the marine terminal on the liquefied natural gas (LNG) project sponsored by Spain's Union Fenosa.

Besix will continue to be headquartered in Belgium and run by Belgian management. In addition to Six Construct, Besix subsidiaries include Entreprises Jacques Delens, Vanhoutand Wust.