Vince Downey is Zack's rival and the main antagonist in the film Employee of the Month.
He was portrayed by Dax Shepard.
When Zack and Vince meet Amy, a hot new coworker who is rumored to be attracted to employees of the month, they begin a fierce rivalry to become employee of the month and win her affections.
The rivalry culminates in a competition to see who can check out items the fastest. Vince wins, but security footage reveals that he did so by under-ringing items and has been doing so with customers for a long time. In the end, Zack gets the girl and Vince loses his job and is put on probation.