The Strong-Campbell Interest Inventory (SCII) has been the most extensively used and researched interest inventory with college graduates. The present research focused on the use of the SCII in occupational counseling of prospective engineering students or of professionals. Specific objectives were to identify an interest profile of engineers using the revised SCII (Campbell & Hansen, 1981), to compare/contrast interest profiles of meaningful subgroups of engineers, classified according to sex, ethnic background, current career field, level of career satisfaction, and number of years since obtaining the bachelor's degree, and to examine the extent to which standard score means of independent samples on the SCII's two "Engineer" scales differ from the means of their respective norm samples. Data were collected from 488 engineers (174 females and 314 males). Results indicate that the "typical" engineer is a composite of rather heterogeneous groups of engineers and that SCII scales have a major utility for differentiating engineering specialities and for counseling potential engineers. Sex, career field, satisfaction, and experience differences were also found, indicating that although engineers tend to differ from non-engineers in interests, major subgroup differences within the engineering profession also occur. (JN)