Three senior executives at LyondellBasell (LBI, Rotterdam / The Netherlands; www.lyondellbasell.com) have assumed expanded roles with immediate effect.

Timothy Roberts is now executive vice president, global olefins & polyolefins (O&P), increasing the coverage of his role from just the Americas to the group’s businesses worldwide.

Patrick Quarles, senior vice president, intermediates and derivatives (I&D), has taken on the management of the company’s supply chain and procurement functions. His new title is senior vice president, I&D, supply chain and procurement.

Meanwhile, Kevin Brown, senior vice president, refining, has been promoted to executive vice president, manufacturing and refining. In addition to leading the refining business, global engineering services and global projects, Brown will now be responsible for all of LyondellBasell’s manufacturing sites worldwide. He has also been nominated by the supervisory board for appointment to the company’s management board.