The purpose of this study wets to survey supervisors and service providers to determine their perceptions of the skills needed to be an effective supervisor of an early intervention program. Of the 1,168 surveys distributed, 442 service providers and 422 supervisors in six states responded to the survey, resulting in a response rate of 74%. Findings revealed that few differences existed between the two professional groups regarding their perceptions of necessary supervisor competencies. Survey items ranked as the most important had three themes: knowledge of rules and regulations, competence in interpersonal skills, and awareness of best practice in early intervention. © 1992, SAGE Publications. All rights reserved.