Researcher at MicrosoftResearch.
Works on HaskellLanguage and CeeMinusMinus.
Home page at http://www.research.microsoft.com/~simonpj/
Author of ImplementingFunctionalLanguages (with DavidLester) and TheImplementationOfFunctionalProgrammingLanguages (with PhilipWadler, PeterHancock, and DavidTurner). Despite the similar titles and same author, these are not the same.