The purpose of this thesis is to examine how academic librarians seek information for themselves and for others, and what differences exist. The terms self-generated and imposed information seeking is used to describe the two different types of information seeking. Step 2 – define and understand the problem, step 3 – choose a search system and step 4 – formulate a query of Marchionini’s information-seeking model forms the basis of the theoretical framework, which is supplemented with Soergel and Katz. Qualitative interviews with eight academic librarians were conducted and analyzed in order to gather empirical facts. The results show that the greatest differences between self-generated and imposed information seeking lie within the definition and understanding of the information problem. The library user’s information need is specified through the reference interview; a process often seen as somewhat problematic by the librarians because of the difficulties involved in trying to understand another person’s needs. Librarians tend to approach imposed information seeking in a structured and pedagogic manner because of their desire to instruct the library user in the use of various databases and search techniques. The Internet is the most used information source during self-generated information seeking, while the library catalogue is the primary source during imposed information seeking. The results also show that only small differences exist in the way librarians use search strategies and search tactics during the two different types of information seeking.