OS : 
    - Unix (Aix, Solaris, HP, Linux, Apache)
    - Microsoft : NT, 2000, IIS
    - OS400
    - Firewall

Database : 
ORACLE, SQL Server , SYBASE, INFORMIX, DB2, MySql, Access  , Notes, …

MiddleWare :

Weblogic, WebSphere, DotNet

Langages : 
Java, J2EE,  JSP, EJB,  C, C ++, C#,  HTML, XML, Javascript, ActiveX COM/DCOM, ASP,  Visual basic, PHP, Coldfusion, Lotus script, RPG, Cobol 

Web technologies  : 
Weblogic, Websphere, Visual Interdev , VisualAge,  Dream Weaver, Flash, Photoshop, Tuxedo

Network LAN et WAN (TCP-IP, X25, ATM, Internet)

Miscelleanous : SAP, Business Object, Ascential, Cognos, TNG, ADSM, 

Conception : UML