Bob Johnston has been named by ExxonMobil as Baton Rouge chemical plant site manager, replacing Paul Stratford, who has begun a special assignment with the ExxonMobil Chemical Co.’s global operations.

Johnston was ExxonMobil’s Beaumont chemical plant site manager in Texas since 2012.

Stratford, a native of Pennsylvania, worked as the Singapore chemical plant process manager, ExxonMobil Asia Pacific, before coming to Louisiana as Baton Rouge chemical plant manager in 2010.

Johnston is a native of Illinois and a chemical engineering graduate from the University of Illinois. He began his career with Exxon in 1987 in Linden, New Jersey.

During his career, Johnston has worked for the company in Baytown, Texas; at ExxonMobil chemical headquarters in Houston, holding global managerial positions in planning, sales and marketing; moved to the fuels marketing business in Leatherhead, U.K., as global commercial aviation sales manager; then corporate offices in Irving, Texas, as chemical senior adviser supporting senior vice presidents; and was the Asia Pacific regional manufacturing manager located in Singapore.