Sebastian Rahtz started as a classics student, moved to archaeology for work, then got into computing for the humanities during the 1980s. In the 90s he worked in publishing and is now in a University computing service where he am responsible for the web site and publications. He has many years experience in typesetting with TeX, and have published widely in that area. He now concentrates on XML, specifically in the Text Encoding Initiative, of whose Consortium he is a Director. He maintains a variety of open-source software offerings, including most recently an implementation of XSL FO in TeX.