Assistant / Planning Engineer, Descon Engineering Qatar, “Laffan Refinery” Gas Plant Subcontracted to Descon Engineering. Scope of project was annual Turnaround Maintenance of Static Equipment. START Date Sat, 02/01/2014 - 01:00 Read more about Assistant / Planning Engineer, Descon Engineering Qatar, “Laffan Refinery” Gas Plant Subcontracted to Descon Engineering. Scope of project was annual Turnaround Maintenance of Static Equipment.