David Wichmann was named chief executive officer of UnitedHealth Group in September 2017. He also served as president since November 2014, chief financial officer of the enterprise from 2011 until mid-2016 and has overseen UnitedHealthcare since 2014. He previously 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 in 1998, Wichmann was a partner with Arthur Andersen. He is the board chair of the YMCA of the Greater Twin Cities and a board member of Tennant Company.