Each year Oscar Mayer selects 12 college graduates and make them "pilots" and anoints them "hotdoggers". They have a one year contract from June to the next June.
Only 378 hotdoggers have ever actually driven the weinermobile. The driver always has someone ride in the seat by them. Probably because Oscar Mayer looks for people who are enthusiastic. Although every person who becomes a hotdogger goes through an intense driving course.
The reason why they always pick college graduates is because they use what they learned in college a lot.