When nonteaching professionals are members of a faculty union, what effect does it have on interstaff relationships and programs? Should campus administration opt for one union or for separate unions for nonteaching professionals? A study of these issues at 18 four-year higher education institutions (comprising 54 campuses) and 72 two-year institutions (with 84 campuses) focused on nonteaching professionals in admissions, financial aid, registrar's offices, counseling, placement and career planning, housing and residence halls, student unions and student activities, health services, and special programs for minorities, the disadvantaged, foreign students, and veterans. Negotiated contracts, professional tenure, working hours, union organization, and reasons for including or excluding nonteachers in unions were considered. The data suggest that nonteaching professionals have a significant community of interest with members of the teaching faculty. This is particularly true at community colleges and among student personnel professionals. Contracts negotiated by unions comprised of faculty and nonteaching professionals have not, however, addressed a substantial number of nonteaching professional concerns. Union organizational structures do not guarantee representation of these concerns. It appears that nonteachers must make special efforts to actively participate in the affairs of the union or they may not receive the full benefits of union membership. (Author/MSE)