The Association for Counselor Education and Supervision (ACES) received an American Association for Counseling and Development Foundation Professional Enhancement Grant to be used in identifying requisite supervisor knowledge and skills and in determining what procedures should be used in establishing a national "approved supervisor" certification program. ACES members (N=724) completed a survey which asked them to: (1) rate the relative importance of each of some 92 specific knowledge and skill factors; (2) describe how these clusters of knowledge and skill characteristics should be acquired and whether they should be included in a certification program; and (3) give recommendations regarding certification requirements, documents, and procedures. The results revealed 26 items in the 6 knowledge and skill scales of personal traits, facilitating skills, conceptual skills, technical/interventional skills, program management/supervision skills, and knowledge of management and supervision. There was strong agreement that evidence of these competencies should be included in a certification program. The findings support the view that ACES should create such a certification program. The proposed certification would be voluntary, designed to demonstrate an individual's professional competence and promote counseling supervision as a valuable, demonstrable professional specialty. (NB)