The systematic identification of evaluator competency training needs is crucial for the development of evaluators and the establishment of evaluation as a profession. Insight into essential competencies could help align training programs with field-specific needs, therefore clarifying expectations between evaluators, educators, and employers. This investigation of practicing evaluators’ perceptions of competencies addresses the critical need for a competency training gap analysis. Results from an online survey of 403 respondents and a follow-up focus group indicate that the professional practice and systematic inquiry competencies are seen as most important for conducting successful evaluations. Evaluators identified need for additional training in the interpersonal competence and reflective practice competency domains. Trends identified can support the development and modification of programs designed to offer training, education, and professional development to evaluators.