A 21-year longitudinal study (1955-1976) was conducted on the educational and professional careers of men who specialized in engineering in Ontario, Canada. Data was collected from schools, universities, employers, and the subjects themselves. In 1956, 683 males and no females enrolled in university engineering courses. In general, the engineering students were a superior group. Of the 683, 65% (444) graduated and the other 35% withdrew without earning a degree. In most cases, withdrawal followed academic failure. The withdrawals were older than the graduates, were more likely to be living away from home, and had fathers who were not in high status occupations. Six or seven years after graduation, 69% of the graduates were practicing engineering in Ontario. Those who did not become engineers in Ontario were practicing the profession outside Ontario or had entered other professions. Information was collected on employment during the academic year, during summer vacations, and after graduation. After approximately fourteen years of working, the average graduate had had three employers. Almost half the respondents had earned no degree other than the bachelor's. Of those who had obtained advanced degrees, 40% had chosen an engineering related field, almost 25% had obtained a master's in business administration, and 10% had obtained doctorates. Four out of five respondents had undertaken some formal education since graduation, although not necessarily for credit. Shortly after graduation, the courses chosen were highly technical; later, they showed ever-widening interests. (LMS)