(RIYADH, Saudi Arabia)—Instruction started this month for a custom Executive MBA that Thunderbird School of Global Management will deliver during the next two years for 28 high-potential managers from Saudi Basic Industries Corp. (SABIC), the largest public company in Saudi Arabia. Working closely with senior leaders from the petrochemical conglomerate, Thunderbird professors will teach customized business courses in English at SABIC Academy in Riyadh and at Thunderbird’s campus near Phoenix,...