School librarians, because of their role in their learning community, are uniquely situated to support and facilitate student learning through collaborative partnerships with other educators. This kind of collaborative work is built into the work of school librarians, exemplified in the American Association of School Librarians (AASL) shared foundation Collaborate. School librarians will best be able to serve their communities by investing early and regularly in relationships with colleagues, administrators, and other librarians. These relationships demand consistency, communication, and intentionality as librarians work to build credibility with their colleagues. This article shares tips for building these professional relationships.