Tillerson joined The Exxon Company, US, in 1975 as an engineer. He held various positions with Exxon, domestically and internationally. In 1995, he became president of Exxon Yemen Inc. and Esso Exploration and Production Khorat Inc. In 1998, he became a vice president of Exxon Ventures (CIS) and president of Exxon Neftegas Limited with responsibility for Exxon's holdings in Russia and the Caspian Sea. In 1999, with the merger of Exxon and Mobil, he was named Executive Vice President of ExxonMobil Development Company. In 2004, he became president and director of Exxon Mobil and on January 1, 2006, he was elected chairman and chief executive officer (CEO), following the retirement of Lee Raymond.
Tillerson re-established his position during a shareholder meeting on May 28, 2008. The Rockefeller family sponsored a non-binding resolution to separate the CEO and chairman positions that Tillerson holds in order to maintain a system of checks and balances. The Rockefeller family also wanted Exxon Mobil to invest more in alternative energy. The resolution did not obtain the necessary majority and Tillerson held on to both job titles.
Exxon Mobil Corp., or ExxonMobil, is an American multinational oil and gas corporation headquartered in Irving, Texas, United States. It is a direct descendant of John D. Rockefeller's Standard Oil company,and was formed on November 30, 1999, by the merger of Exxon and Mobil (formerly Standard Oil of New Jersey and Standard Oil of New York). It is affiliated with Imperial Oil which operates in Canada.