Wichmann was CEO of UnitedHealth Group from 2017 until his retirement in 2021. His 23-year career iat UnitedHealth included roles as president, CFO, and head of oerations and commercial markets. Previously, he was a partner at Arthur Anderson & Co. Previously Mr. Wichmann was Executive Vice President of UnitedHealth Group and President of UnitedHealth Group Operations and served in that capacity since April 2008. From December 2006 to April 2008, Mr. Wichmann served as Executive Vice President of UnitedHealth Group and President of the Commercial Markets Group (now UnitedHealthcare). From July 2004 to December 2006, Mr. Wichmann served as President and Chief Operating Officer of UnitedHeathcare. In 2004, Mr. Wichmann served as Chief Executive Officer of Specialized Care Services (now OptumHealth). Mr. Wichmann joined UnitedHealth Group in 1998 and held various executive positions with the Company from 1998 to 2004.