Create Chioces from Subform Entries

Create Chioces from Subform Entries

I'm sure this has been asked and answered, but I'm not a developer. I get lost trying to follow the custom scripts that have been posted.

I have a main setup form.

I have a sub-form where a manager can setup different job-types. The manager can give the job-types their own name (name of the sub-form.) For example, "Admin," "Manager," "Line Worker." These would be the names of different sub-forms attached to the main form.

Later on, I have another sub-form where a manager can setup their employees and assign them Job-types. For example...
First Name: "Betty"
Last Name: "Boop"
Job Type: (Choose from drop-down or choices... the names of the previous sub-forms) "Line Worker"

It doesn't look like rules will be much help, unless I missed something? Any feedback is appreciated.