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Sarah R. Opperman has been a director of the Bank and Isabella Bank Corporation since 2012. Ms. Opperman was appointed Chair of the Board for the Corporation and the Bank in May 2021. Ms. Opperman was employed by The Dow Chemical Company for 28 years, retiring as vice president of Global Government Affairs and Public Policy in 2009. She previously was a member of the CMU Board of Trustees, completing an eight-year term in 2016. She currently serves on the CMU Advancement Board, chairs the MidMichigan Health Foundation and is treasurer of the United Way of Midland County.