To thrive as a Substitute Librarian, you should have knowledge of library organization, cataloging, and circulation procedures, often supported by a degree in library science or relevant work experience. Familiarity with integrated library systems (ILS), library databases, and digital cataloging tools is valuable. Strong soft skills such as adaptability, communication, and customer service enhance your ability to support patrons and collaborate with library staff. These competencies are crucial for maintaining smooth library operations and ensuring a positive experience for visitors when filling in for permanent staff.