Mark Nelson

Vice Chairman; Executive Vice President, Oil, Products & Gas Chevron

Last Reviewed: October 1, 2026

Executive Summary

Mark Nelson is Vice Chairman of Chevron and, since October 2024, Executive Vice President for Oil, Products & Gas, responsible for the company’s value chain from production through refining and marketing. He joined Chevron in 1985 as an engineer and has run its downstream and chemicals business, its strategy and policy functions, its international products business and Chevron Canada. Chevron ranked No. 21 on the 2026 Fortune 500.

Career Highlights

• Vice Chairman of Chevron since February 2023.
• Executive Vice President, Oil, Products & Gas since October 2024.
• Executive Vice President, Strategy, Policy & Development, 2022 to 2023.
• Executive Vice President, Downstream & Chemicals, 2019 to 2022.
• Joined Chevron as an engineer in 1985.

Professional Journey

Nelson earned a bachelor’s degree in civil engineering at California Polytechnic State University and joined Chevron U.S.A. in 1985 as an engineer in San Ramon. He went on to lead Chevron Canada, International Products, strategic planning, and midstream, strategy and policy.

He was Executive Vice President of Downstream & Chemicals from 2019 to 2022 and then of Strategy, Policy & Development. He became Vice Chairman in February 2023 and took responsibility for Oil, Products & Gas in October 2024. He serves on the board of the Thurgood Marshall College Fund.

Education

California Polytechnic State University

Bachelor’s degree, Civil Engineering