After completing a degree at Oxford in Mathematics and Philosophy, Mark Wallace joined the UK computer company ICL, who funded his PhD at Southampton University, and which was published as a book: Communicating with Databases in Natural Language. He has been involved in the ECLiPSe constraint programming language since its inception and has led several industrial research collaborations exploiting the power of constraint programming with ECLiPSe. He is currently involved in a major new constraint programming initiative funded by National ICT Australia (NICTA), and in the foundation of a Centre for Optimisation in Melbourne. He has published widely, chaired the annual constraint programming conference, and is an editor for three international journals.