Web Development - PHP, Wordpress, Drupal
Web Application Administration (hosting) - PHP, Zend, Cpanel, Apache, Tomcat
System Administration - Linux, Unix, Solaris
IP Telephony - VoIP, IP-PBX, IP-ContactCenter, IVR application
Database Administration - MySQL, PostgreSQL, Oracle
Cloud - Amazon Web Services, SaaS, PaaS, IaaS
Learning & Content Management System - Moodle, Sakai