Robert Burrell Donkin is agile developer by day, open sourcerer by night. Old enough to have experienced DSDM and Extreme Programming when they were shiny, he remembers well the dark days before test first. Open source highlights include micro-libraries in the Apache Commons, community building in the Apache Incubator and email protocol implementation in Apache James. Had fun helping Mark with last year's Agile course module. Elected a Member of the Apache Software Foundation in 2005.

Mark van Harmelen has worked in a whole slew of different areas in Computer Science, including, in the dim and distant past, staring down oscilloscopes and logic analysers looking for lost nanoseconds. Mark spent several years specialising in user interface and interactive system design, and, in part based on work at National Panasonic’s Tokyo Research Centre, produced Object Modelling and User Interface Design: Designing Interactive Systems together with a bunch of collaborators. In 2002 he led the team that formulated the establishment of the Meraka Institute in South Africa. Mark now runs Hedtek, a small software house that specialises the production of social software to support educational processes and other high tech topics; for example recently putting 1.3T linked data triples on the web. Mark teaches an annual software engineering course module in the University of Manchester’s School of Computer Science, most recently on agile methods. He has a PhD in Computer Science.