This study developed the first measurement instrument designed to accompany the concept of competency basing in counselor training. In so doing, the study screened and validated a list of skills most essential in an effective counselor. The process began with a composite list of some 1600 competencies and subordinate skills enumerated by three universities pioneering the concept of performance-based counselor training. The list was reduced to 180 by a broad-based validating panel of 46 specially chosen guidance experts. In addition to the finished measurement instrument, the study reports the average rating of each item, then categorizes the competencies into the areas of counseling, consultation, coordination, and organization and evaluation. This flexible instrument may be used by individual counselors for self-evaluation, by entire organizations for assessment and comparisons, or by other kinds of groups for various specialized purpose. (Author/PC)