ExxonMobil has announced that Liam M. Mallon, president of ExxonMobil Upstream Company and vice president of Exxon Mobil Corporation, will retire effective February 1, 2025. The board of directors has appointed Dan L. Ammann to succeed Mallon as president of ExxonMobil Upstream Company. Ammann will also continue to serve as vice president of Exxon Mobil Corporation. Additionally, Barry L. Engle has been named president of Low Carbon Solutions (LCS) and vice president of Exxon Mobil Corporation, effective January 1, 2025.
Acknowledging Contributions and Strengthening Leadership
“We thank Liam for his long-standing, dedicated service to the company, and we wish him all the best in his well-deserved retirement,” said Darren Woods, chairman and chief executive officer of ExxonMobil.
The appointments reflect ExxonMobil’s strategy of leveraging the diverse skills and experiences of its executive team. “These transitions bring fresh perspectives to our exceptionally talented organisations, challenging conventions and broadening our leadership approach,” Woods added.
Liam M. Mallon’s Career at ExxonMobil
Mallon has been with ExxonMobil since 1990, beginning his career in Aberdeen, Scotland. He has served as president of ExxonMobil Upstream Company since 2022, playing a pivotal role in advancing the company’s upstream operations.
Dan L. Ammann’s Expanded Role
Ammann joined ExxonMobil in 2022 as president of Low Carbon Solutions, where he spearheaded the development of profitable, large-scale emissions-reduction solutions for key industries. Before joining ExxonMobil, he was CEO of Cruise, an autonomous vehicle subsidiary of General Motors (GM), and previously served as GM’s president from 2014.
Barry L. Engle’s Appointment to Low Carbon Solutions
Engle, who joined ExxonMobil in September 2024, brings three decades of experience in the automotive industry, including leadership roles at GM. He previously served as president of GM North America, GM’s largest business unit, and as president of GM International.
These leadership changes underscore ExxonMobil’s commitment to innovation and organisational strength as it continues to address global energy challenges while expanding its low-carbon solutions portfolio.
For more information visit www.corporate.exxonmobil.com
