A. T. (Tim) Cejka, president, ExxonMobil Exploration Company, and vice president, Exxon Mobil, has elected to retire on Aug. 31, 2010, after more than 34 years of service.
It is anticipated that the board of directors of Exxon Mobil Corporation will appoint S. M. (Steve) Greenlee as president of ExxonMobil Exploration Company and elect him a vice president of the corporation effective Sept. 1, 2010. Greenlee is currently president, ExxonMobil Upstream Research Company.
It is anticipated that the board of directors of ExxonMobil Upstream Research Company will elect S. N. (Sara) Ortwein as president effective Sept. 1, 2010. Ortwein is currently vice president engineering, ExxonMobil Development Company.
Cejka, a native of Pittsburgh, PA, joined Exxon Company, USA in 1975 as a geophysicist in Houston, TX, before moving in 1981 to New Orleans, LA, where he became district geophysicist and later senior exploration supervisor. Cejka held a number of technical and management positions in Exxon Company, USA and Exxon Corporation before being named vice president of Exxon Ventures Inc. in 1993.
Cejka became vice president for geoscience for the Caspian and Middle East regions for ExxonMobil Exploration Company in 1999. He was appointed executive vice president of ExxonMobil Exploration Company in 2001 and became president in 2004.
Greenlee, a native of Short Hills, NJ, joined Exxon Production Research Company in 1981 after receiving a bachelor's degree in geology from Duke University and a master’s degree in geological oceanography from the University of Rhode Island. He held several research and supervisory positions with Exxon Production Research Company in Houston and London before moving to Exxon Ventures Inc. in 1993 where he had supervisory responsibilities for Western Siberia and Kazakhstan.
In 1996, Greenlee became manager of geological operations for production operations at Exxon Company, USA, based in New Orleans. He was appointed manager of area geoscience for Brazil for ExxonMobil Exploration Company in 2000 and a year later became vice president, geoscience, for Saudi Arabia.
Greenlee became upstream advisor at Exxon Mobil Corporation headquarters in Irving, TX, in 2002 and was appointed vice president for geoscience for Asia Pacific, ExxonMobil Exploration Company, in 2004. He was elected president of ExxonMobil Upstream Research Company in June 2009.
Ortwein, a native of Houston, TX, joined Exxon Company, USA as a drilling engineer in 1980 after receiving a bachelor's degree in civil engineering from the University of Texas. She held several engineering positions at Exxon Company, USA in the East Texas division before becoming an engineering supervisor in the Central division in 1985. In 1987, Ortwein was named adviser for operations analysis and later supervisor of the reservoir and subsurface engineering organization.
Ortwein held a number of technical and management positions in Exxon Company, USA, Exxon Ventures Inc. and ExxonMobil Production Company.
Ortwein became an upstream adviser at corporate headquarters in 2001, and in 2003 became deputy production manager and later production manager for U.S. Production for ExxonMobil Production Company. She was appointed vice president of engineering for ExxonMobil Development Company in 2006.
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