press release

Unocal appoints Ling, Williamson to board of directors; Imle resigns as vice chairman

El Segundo, Calif., Dec. 9, 1999 -- Unocal Corporation today announced the appointments of Timothy H. Ling and Charles R. Williamson to the company's board of directors effective Jan. 1, 2000.

Ling, 42, is currently Unocal's chief financial officer and executive vice president, North America Energy Operations. Williamson, 51, is executive vice president, International Energy Operations. Ling and Williamson are also currently members of the company's management committee.

As announced in August, John F. Imle, Jr., has resigned from the board effective Dec 31. Imle, who was vice chairman and director, will continue to serve as a consulting employee of the company.

The changes raise the total size of the board of directors to 10, including three company employees.

"The addition of Tim Ling and Chuck Williamson on the board of directors will provide for greater integration between company operations and our non-employee directors," said Roger C. Beach, Unocal chairman and chief executive officer. "Tim provides the right blend of technical, financial and commercial leadership to maximize the performance of our U.S. oil and gas operations, while Chuck's leadership skills and technical expertise are critical to our future success as we pursue extraordinary growth opportunities in Asia, South America, and West Africa."

Beach also commended Imle for his service to Unocal. "John has had a distinguished 36-year career with Unocal," Beach said. "He has been instrumental in expanding Unocal's global energy resource growth portfolio. John will continue to provide counsel and support to the company as we move forward."

Biographical information

Ling was named executive vice president, North America Energy Operations, in March 1999. He joined Unocal in 1997 as chief financial officer and member of the management committee. As CFO, Ling has a strategic role, focusing on mergers, acquisitions and investor relations.

He received a bachelor of science degree from Cornell University in 1982 and a master of business administration degree from Stanford University in 1989.

Prior to joining Unocal, he had been an employee of McKinsey & Company since 1989 and a partner of the firm since 1994.

Williamson was named executive vice president, International Energy Operations, and member of the management committee in 1999. He holds a Ph.D. in geology from the University of Texas at Austin.

Williamson joined Unocal in 1977 as a research associate for Unocal's Science and Technology Division in Brea, California. In 1983, he was named chief exploration geologist for Unocal in the United Kingdom, and in 1986, he became exploration manager of Unocal Netherlands.

Williamson was named vice president of exploration for Unocal Thailand in 1989. He then became vice president, Technology, in 1992. In 1995, he was appointed vice president, Corporate Planning and Economics. In 1996, he was named group vice president, International Operations. In 1997, Williamson assumed the position as group vice president, Asia Operations.

Imle was named vice chairman of Unocal Corporation's board of directors in 1999. He has been instrumental in developing major business initiatives throughout Asia and in South America.

A graduate of Texas A&M University with degrees in petroleum engineering and mechanical engineering, he joined Unocal in 1963 and has held various technical and managerial positions in the Gulf Coast, Alaska, West Africa and the North Sea.

In 1983, Imle was named president, Unocal International Oil & Gas Division, and became senior vice president, Energy Resources, responsible for the company's global oil, gas and geothermal operations, in 1988. At that time, he was elected to Unocal's board of directors. Imle was named executive vice president in 1992 and president of the corporation in July 1994.

Updated: December 1999