Andrew Swiger, senior vice president of Exxon Mobil Corporation has announced his intention to retire effective Sept. 1 after more than 43 years of service. The board of directors has elected Kathryn Mikells, a former executive with Diageo, United Airlines and Xerox, as senior vice president, effective Aug. 9. Mikells joins ExxonMobil from Diageo plc, where she held the position of chief financial officer since 2015 and was a member of the board of directors. In this role, she was accountable for strategy, investor relations, supply chain, procurement and finance. Previously she was chief financial officer at Xerox, ADT, Nalco and United Airlines. During her time at United Airlines, she was also vice president of investor relations and treasurer.