press release

Patricia E. Yarrington Named Chevron Treasurer

David Krattebol retires after distinguished career with the company

SAN RAMON, Calif., April 26, 2007 -- Chevron Corporation (NYSE: CVX) today announced Patricia E. Yarrington has been named corporate vice president and treasurer, replacing David M. Krattebol, who is retiring from the position after 36 years with the company. In addition, the company announced a series of senior level appointments, which will be effective May 16, 2007.

"Dave's contribution to Chevron during his distinguished career has been significant," said Dave O'Reilly, Chevron's chairman and chief executive officer. "As our corporate treasurer, Dave has skillfully guided our financing strategy."

Over the course of his career, Krattebol, 62, served in a number of financial and management positions both in and outside the United States. He joined Chevron in 1971 after serving in the U.S. Navy and was appointed vice president of Finance for Chevron Overseas Petroleum in 1990, vice president of Finance for Chevron Products Company in 1996, vice president of Logistics and Trading in 1998, and president, Chevron San Jorge, Argentina, in 1999. Krattebol was named corporate vice president and treasurer in 2000.

Yarrington, currently corporate vice president, Policy, Government and Public Affairs, will oversee the company's financing strategies, including the receipt, custody, investment and disbursement of corporate funds in her new role. "Pat's background across many areas of our company, including finance, operations, strategic planning and public affairs, makes her uniquely qualified to assume the corporate treasurer's position," O'Reilly said.

Yarrington, 51, joined Chevron in 1980 and has held a variety of finance and managerial positions in Chevron Products Company, Chevron U.S.A. Production Company, Chevron Research and Technology Company and Chevron Corporation. In 1986, she was appointed manager of Investor Relations. In 1995, she became manager of credit card enterprises for Chevron Products Company and was later appointed comptroller for Chevron Products Company in 1997. In 1998, Yarrington was named president of Chevron Canada Ltd. She became a vice president of Chevron Corporation in 2000, overseeing strategic planning, and mergers and acquisitions. Yarrington assumed her current role in 2002. She is also a member of the board of directors for Chevron Phillips Chemical Company, a 50-50 joint venture with ConocoPhillips.

Replacing Yarrington as corporate vice president, Policy, Government and Public Affairs, is Rhonda I. Zygocki, currently corporate vice president, Health, Environment and Safety (HES). In her new capacity, Zygocki will be responsible for corporate policy, government relations, internal and external communications, corporate advertising, and community engagement activities.

Zygocki, 49, joined Chevron Canada in 1980 as a petroleum engineer and advanced through various positions before being named general manager of Strategic Business Services for Chevron Canada in 1993. In 1994, Zygocki moved to Chevron U.S.A. Production Company in Houston after being appointed profit center manager. In 1997, she returned to Chevron Canada as chief financial officer. Zygocki moved to Chevron's corporate headquarters in 1999 when she was named manager of strategic planning for the corporation, and subsequently was responsible for overseeing the merger integration planning office. She was appointed managing director of ChevronTexaco Australia Pty Ltd. in 2001 prior to being named to her current position in 2003.

Succeeding Zygocki as corporate vice president of HES is Charles A. Taylor, currently general manager, asset management, Chevron International Exploration and Production Company in Lagos, Nigeria. In his new role, Taylor will oversee the company's HES strategic planning and issues management, compliance, auditing, and emergency response. He also will play a key role in the ongoing implementation of the company's Operational Excellence Management System, which is Chevron's approach to systematically manage safety, health, the environment, reliability and efficiency.

Taylor, 49, joined Gulf Oil in 1980 and held various positions in the company's Gulf of Mexico upstream business. After the merger of Chevron and Gulf Oil in 1985, Taylor held a number of positions of increasing responsibility, becoming a district operations manager in Sumatra, Indonesia, in 1996. In 1999, Taylor was appointed general manager of Operations in Aberdeen, Scotland. He assumed his current position in 2003.

About Chevron

Chevron is one of the world's leading energy companies. With approximately 56,000 employees, Chevron subsidiaries conduct business in more than 180 countries around the world, producing and transporting crude oil and natural gas, and refining, marketing, and distributing fuels and other energy products. Chevron is based in San Ramon, Calif. More information about Chevron is available at

Published: April 2007