Stephen D. Pryor is President of ExxonMobil Chemical Company and a vice president of the corporation. He is based in ExxonMobil Chemical's Headquarters in Houston, Texas.   

Mr. Pryor joined Mobil Oil Corporation in 1971 as a marketing representative in New York.  After receiving his MBA in 1975, he had several assignments in International Treasurers in New York and London before being named general manager of Mobil Oil Cyprus in 1981.  In 1983, he was appointed manager, Public Affairs, Mobil Europe based in London, and the following year, manager, Information Systems.  Returning to New York in 1985, he held managerial assignments in International Marketing & Refining Planning.  In 1987, Mr. Pryor became general manager, Mobil Oil New Zealand, and in 1990, general manager, Planning and Financial Analysis for U.S. Marketing based in Fairfax, Virginia.

In 1993, Mr. Pryor was appointed vice president, U.S. Marketing and Refining, and later that year, vice president, Mobil Chemical Company.  In 1996, he became president, Mobil Asia Pacific.  The following year, Mr. Pryor was named executive vice president, Mobil Oil Corporation and president, International Marketing and Refining.  Following the merger of Exxon and Mobil in 1999, he was named president, ExxonMobil Lubricants and Petroleum Specialties Company.  He moved to Houston, Texas, in January 2002 to become executive vice president, ExxonMobil Chemical Company where his responsibilities included manufacturing, engineering and major joint ventures. 

In August 2004, he returned to Fairfax to become Deputy to the President of ExxonMobil Refining & Supply Co.  He became President of ExxonMobil Refining & Supply Company in December.  Steve Pryor was appointed to his present position of President, ExxonMobil Chemical Company effective April 1, 2008. 

Mr. Pryor earned a bachelor's degree in biology from Lafayette College and an MBA from Harvard University.  He is a trustee of Lafayette College and serves on the board's Educational Policy Committee.  He is a former director of the National Foreign Trade Council and served on the advisory board of the Asia Society.