New Users Added default to "Project Delivery Download" group.

I was wondering if there is a way that new, self-created user accounts could default to the “Project Delivery Download” group when creating an account for the Caltrans subscription? Caltrans has lots of new users across the state and the admin has to manually change each new person in order to download the software. It is very inconvenient, and it seems like an unnecessary extra step. Or, can this be added as a setting for the Caltrans Admin because we already screen users internally, and employees can't install software without admin support. Or is there a level of administrator below full/co admin who could add accounts with this default setting? If we have to wait for the co/admin to change each account, users have to wait a long time before they can use the software. Maybe only make it possible to create an account if they have a valid, working @dot.ca.gov email or S number.