| Aspect | Substitute Reference Librarian | Reference Librarian |
|---|
| Credentials | Master's degree in Library Science (MLS) or equivalent | Master's degree in Library Science (MLS) or equivalent |
| Work Environment | Temporary or as-needed basis, covering absences | Full-time or part-time, regular schedule in libraries |
| Employer Usage | Libraries hire substitutes for short-term coverage | Libraries employ as a primary staff member |
| Search & Comparison | Often searched for as temporary or relief librarian | Standard professional librarian role |
The main difference is that a Substitute Reference Librarian works temporarily to cover absences, while a Reference Librarian holds a regular, ongoing position. Both roles require similar credentials but differ in employment type and work schedule.