This feature is only available to Admins and Leads.
Jobs in Action Builder are built off of the Info function, so the first step of setting up Jobs in a campaign is to create the necessary info.
The best way to do this is to create a separate Sections for storing your Jobs information. Importantly, you should create Info for the work locations with the Info Type as Address. This will be your Key Address when setting up your Jobs fields and will allow you to Map your worksites.
See the example below for a potential way to set up your Job Group: