Andreas Wolter is one of around 120 Microsoft Certified Master SQL Server 2008 (MCM) worldwide, in Germany the only one independent from Microsoft, and holds numerous other certifications, including MCT, MCITP:DD/DA/BID, MCDBA, and MCSA.
He has worked for over a decade as trainer, consultant and architect for SQL Server systems.
Being an active member of the PASS since several years he is also a speaker at various international conferences.
With his company, Sarpedon Quality Lab (www.SarpedonQualityLab.com), he specializes in development and optimization of database and data warehouse systems, with a focus on scalable, performing and secure deployments. You can find his blog at http://www.vb-magazin.de/forums/blogs/andreaswolter and his TwitterHandle is @AndreasWolter.