He received the Ph.D. degree in Artificial Intelligence from the Department of Computer Science, Maastricht University in 2004. His research interests include heuristic search, machine learning and games. He regularly serve on program committees of major AI and computer games conferences. He is an editor-in-chief of the ICGA Journal and an associate editor of IEEE Transactions on Computational Intelligence and AI in Games. He is author of various game playing programs, most notably his Lines of Action program MIA, successfully competing at ICGA tournaments. Mark researched on Proof-Number Search, and introduced Enhanced Forward Pruning, which applies Forward Pruning Techniques, such as Null Move Pruning and Multi-Cut.