[1] He began taking classes at Second City in Chicago as a teenager and also performed as a birthday party magician before focusing mainly on comedy and acting.
Witaske attended St. Charles High School and after graduation, he commenced his studies at the University of Iowa where he majored in Theater Arts.
[2][3][4] In 2014, Witaske made his television acting debut in the Fox comedy-drama series New Girl.
Following on from his first role, Witaske won other roles on a variety of TV shows and films including The Comeback, Teachers, Drunk History, Lady Bird, Unicorn Store, What Men Want, Arrested Development, Weird City, The Wrong Missy, and The Bear.
In 2016, Witaske was cast as Chris Czajkowski in the Netflix romantic comedy Love[5] and was promoted to a series regular role the following year.