This article considers the evolution of the professional librarian from a collection-centered liaison librarian to a service-oriented, embedded specialist. It analyzes the competencies required to provide embedded library services and describes a process for establishing an embedded librarian model in a university library in an "Expert Librarian" project. Examples of services and products that libraries could provide are suggested. The article also discusses the possible transformation of embedded librarians into providers of a service known as knowledge "process outsourcing."