[3] De Witt worked for the MidAmerican Energy Company for 22 years.

[4] After leaving MidAmerican Energy, De Witt provided security for the Woodbury County Sheriff's Office.

[5] De Witt was first elected to the District 5 seat on the Woodbury County Board of Supervisors in November 2016,[6] and reelected in 2020.

[1][8] In December 2021, De Witt began his campaign for the District 1 seat of the Iowa Senate.

[9][10] De Witt defeated incumbent Democratic legislator Jackie Smith, who was redistricted to District 1.