This paper was read at American Psychological Association Meetings at San Francisco on September 6, 1955. It reports on the first phase of a project whose long-term goal is to make it feasible to guide, select, and place engineering graduates in the functional kinds of work in which they show most promise of success. This first phase has aimed to provide a description of the individual differences that actually exist among engineers with four to seven years of post-graduation experience, and to relate these dimensions of difference to concurrently obtained criteria of job placement and job success.