An objective method of job description, employing a "Key Group Data Form," was developed and used to compare 24 engineering jobs in five companies. The main differences in jobs were found to exist within each company, with jobs in one company paralleling those in others. A functional classification of engineering jobs was obtained in the following form: Technical Engineering: Research Engineering; Applications Engineering; Design Engineering; and Product Engineering. Administrative Engineering: Operations Engineering; Supervisory Engineering; and Sales Engineering. Clusters of activities characterizing each of these functions are presented.