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David S. “Dave” Wichmann has been a director of Boston Scientific since June 2021. Mr. Wichmann is the former chief executive officer of UnitedHealth Group, Incorporated, having served in that position from September 2017 through March 2021. Prior to this role, he served as president, UnitedHealth Group, beginning in November 2014, with oversight responsibility for all of UnitedHealthcare's domestic and international businesses, and for overall UnitedHealth Group performance, and as chief financial officer of the UnitedHealth Group from 2011 until 2016. In addition, during his time at UnitedHealth Group, he also held positions as president, UnitedHealthcare; president and chief executive officer, Specialized Care Services (now OptumHealth); and senior vice president, Corporate Development. Prior to joining UnitedHealth Group, Mr. Wichmann was a partner at Arthur Andersen & Co. and chief financial officer of Advanced Machine Company. He previously served on the boards of UnitedHealth Group Incorporated and Tennant Company. Mr. Wichmann received his B.S. in accounting from Illinois State University.