Mueller was confirmed by the Senate (unanimously!) for his position as FBI director on 2 Aug 2001.

https://www.congress.gov/nomination/107th-congress/668?q=%7B%22search%22%3A%5B%22robert+mueller+confirmed+by+the+senate+2001%22%5D%7D&r=1

https://www.fbi.gov/history/timeline

http://www.cnn.com/2001/LAW/08/02/mueller.fbi.vote/

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Whitaker was confirmed by the Senate (count unavailable due to voice vote) for his position as United States Attorney for the Southern District of Iowa on 3 Jun 2004.

https://www.congress.gov/nomination/108th-congress/1314?q=%7B%22search%22%3A%5B%22matthew+whitaker+confirmed+by+the+senate+pn1314%22%5D%7D&r=1

https://dailycaller.com/2018/11/08/who-is-matthew-whitaker/