Programming languages:
C#.NET, VB.NET, VBA, VB6, C++

Website development/design
ASP.NET, PHP, HTML, XHTML, CSS, JavaScript, AJAX, Silverlight, WebServices

Databases
MS SQL Server, Oracle, MS Access, MySQL

Web servers
Internet Information Server, Apache, Tomcat

Further technologies
XML, XAML, Silverlight, Flex, SAP-interfaces, SOAP, Web-Services, COM/COM+

Special knowledge
GIS, ESRI ArcGIS, PolyGIS

Architectures
service-oriented architecture (SOA), client/server-architectures, multilayered architectures, web-based solutions with ASP.NET, WPF-applications

Methodes
Agile Programming, V-Modell XT, object-oriented programming, UML, Design Patterns, Software Factories