The innovative uses of lipases in a wide variety of organic syntheses and the modification of existing fats and oils have increased exponentially over the last five years, due to the increasing availability of lipases from (genetically engineered) microbial sources, coupled with their special capacity to act as catalysts at hydrophilic/hydrophobic interfaces. As a result of the structural characterisation performed during the same period, applications of these lipases can now be developed in a much more rational way. Engineering of/with Lipases presents two major topics: the design and production of lipases with desired, preselected properties, and the use of lipases for desired applications. Audience: Doctoral and post-doctoral crystallographers, biochemists, geneticists and enzyme kineticists. Food, chemical and biochemical engineers. The former will learn about the practical aims and constraints associated with industrial applications of lipases, enabling them to design lipases for specific purposes. The latter will learn how to take advantage of the structural knowledge of lipases and their metabolic genesis to better design media, processes and products in terms of biochemical and technical feasibility.