Policy 1.40, Performance Planning and Evaluation, does not specify whether other parties may be present at the performance review meeting in addition to the employee and supervisor/evaluator.
However, longstanding practice in most agencies has established that only the employee and the supervisor should attend this meeting. In order to have the kind of open and honest exchange of information that is vital to the performance management process,
it is important that the privacy of the meeting be maintained. In most cases, no third party should be brought into this meeting. If unusual and important concerns require the presence of a third party, a Human Resource professional should attend.