Mark Lashier

Chairman and Chief Executive Officer Phillips 66

Last Reviewed: October 1, 2026

Executive Summary

Mark Lashier has led Phillips 66 as Chief Executive Officer since July 2022 and as Chairman since May 2024. He came to the top job through the company’s chemicals side: over more than 30 years he worked his way up at Chevron Phillips Chemical, the joint venture Phillips 66 owns with Chevron, through planning, international project and business unit roles, and was its President and Chief Executive Officer from 2017 to 2021. He became President and Chief Operating Officer of Phillips 66 in 2021. He is also a director of Motorola Solutions. Phillips 66 ranked No. 29 on the 2026 Fortune 500.

Career Highlights

• Chairman and Chief Executive Officer of Phillips 66 since May 2024; CEO since July 2022.
• President and Chief Operating Officer, 2021 to 2022.
• President and Chief Executive Officer of Chevron Phillips Chemical, 2017 to 2021.
• Director of Motorola Solutions.

Professional Journey

Lashier spent much of his career at Chevron Phillips Chemical Company, the petrochemical joint venture of Phillips 66 and Chevron, in roles including Regional Manager in Asia, Project Director for Saudi Arabia, Vice President of Corporate Planning and Development, Senior Vice President of Specialties, Aromatics and Styrenics, and Executive Vice President of Olefins and Polyolefins. He was its President and Chief Executive Officer from August 2017 to April 2021.

In April 2021 he became President and Chief Operating Officer of Phillips 66, and in July 2022 President and Chief Executive Officer. He joined the board in 2022 and became Chairman in May 2024. He also serves on the board of Motorola Solutions.

Education

No first-party source read for this profile states his education.