In an economy in which knowledge becomes more and more important as the main resource of economical success, workers, teams and companies need to develop the necessary competencies to be able to participate in a work life that is mainly based on knowledge productivity. In this paper we first outline knowledge work and its key issue areas. Second, we stress the necessity to combine work processes with training processes in the context of knowledge work. In the third part of this paper, we outline one approach developed by a consortium of research institutes and companies to overcome the gap between knowledge requested and content provided by a tool-based service to improve the skills of employees at the workplace.