I joined Microsoft Germany in 1998, and moved to the Visual Studio Group in Redmond in 2000. The last two years I have been working in the C# product unit, currently in the DLinq team, and plan to blog about DLinq from time to time. The current web site for LINQ and DLinq is here: http://msdn.microsoft.com/netframework/future/linq/
Before joining Microsoft I studied mathematics in Bonn, Germany and Cambridge, UK and worked as a mathematician at
Max-Planck-Institut für Mathematik, Bonn, Germany,
Institute for Advanced Study, Princeton, NJ,
Katholische Universität Eichstätt, Germany.
As a hobby, I am still interested in some mathematical aspects of Computer Science, and may also blog about that.