One of the roles in one of the Change Templates is Implementer.

When setting up the template one chooses the Technicians who are allowed to perform the required action (it would be great to set this up as a group).

When an employee leaves the organisation and the Technician license is taken from that person he/she is still in the Implementer role in the Change Template. That in itself is not a problem but what we encountered was that users are unable to save that Change Template, an error occurs:

The following role(s) could not be assigned to the user(s) - (Implementer= nameofEmployee).

It is just a bit tedious to have to search through all templates if an emplyoee leaves. 

Maybe it is possible to choose groups in the roles but I was not able to see how.