Approvals of Multiple Teams with Multiple Users

[steresi]

I have a use case in JSM to have a field "Implementing Team" which has 5+ teams listed that will populate another field that lists all the users "Implementing Team Approvers"  that belong to the "Implementing Team" to allow me to put an approval workflow in place.  

Example:

Implementing Team A = Implementing Team Approvers: Tom, Joe, Larry

Implementing Team B = Implementing Team Approvers: Karen, Ann, Kim

If I picked Implementing Team A is there a way to populate Tom, Joe and Larry in another field for users to choose from?

Thank you