Willibrordus Martinus Pancratius van der Aalst (born 29 January 1966) is a Dutch computer scientist and full professor at RWTH Aachen University, leading the Process and Data Science (PADS) group.

His research and teaching interests include information systems, workflow management, Petri nets, process mining, specification languages, and simulation.

[2] In 1992 he started working at the Eindhoven University of Technology as an assistant professor for the department of Mathematics and Computing Science, where he headed the Specification and Modeling of Information Systems (SMIS) research group.

He is also a member of the Royal Holland Society of Sciences and Humanities (Koninklijke Hollandsche Maatschappij der Wetenschappen) and the Academy of Europe (Academia Europaea).

Van der Aalst's ideas have also influenced various widely used commercial software tools such as Flower, Protos, Futura Reflect, Staffware, WebSphere, and ARIS.