Rhonda I. Zygocki, executive vice president of policy and planning for Chevron, has elected to retire from the company after 34 years of service effective Feb. 1, 2015. The company also said it is making new reporting assignments for several executives.

Zygocki is a native of St. John's, Newfoundland, Canada. She began her career in petroleum engineering with Chevron Canada Resources in Calgary after graduating in 1980 from Memorial University of Newfoundland with a bachelor's degree in civil engineering. In 2011, Memorial University honored Zygocki as its Alumna of the Year for her career achievements and many contributions inside and outside Chevron.

During her career at Chevron, Zygocki held positions of increasing responsibility, including managing director of Chevron Australia. As a senior officer in the company, Zygocki was central in the design and implementation of Chevron's Operational Excellence Management System that elevated the company's approach to health, safety, environmental stewardship and reliability. She also advanced Chevron's approach to enterprise risk management; evolved its stance on important public policy issues, such as climate change and human rights; expanded Chevron's global social investments and partnerships; and represented the company on a range of health, education and economic development issues, including Chevron's substantial effort to fight HIV/AIDS.

Zygocki's contributions also have extended beyond Chevron. She serves on the board of directors of the United States Energy Association and GBCHealth; the board of trustees of the San Francisco Ballet; and the advisory board of theWoodrow Wilson International Center for Scholars' Canada Institute.

Following the announcement of Zygocki's pending retirement, three new reporting assignments are being announced effective Jan. 1, 2015: Steve Green, vice president, policy, government and public affairs, and Joe Naylor, vice president, strategic planning, will report to John Watson.

Wes Lohec, vice president, health, environment and safety, will report to Joe Geagea, senior vice president, technology, projects and services.