MS Exchange
SharePoint
System Centre Suite
AD, O365
VMWare
HyperV
Citrix Xen
Oracle
Microsoft SQL
MY SQL
Postgress
CommVault
Veritas
HP Data Protector
Veeam
OS hardening
Vulnerability Assessment and Penetration Testing (VAPT)
Menlo Security
Chef
Puppet
Ansible
Upguard
Commvault Next Generation Platform
Veritas Netbackup/Backup Exec
HP Data Protector
Symantec Enteprise Vault
Microsoft Exchange, Office 365
Lotus Domino
Postfix/Sendmail/Qmail
Upgrades, patching
Microsoft Windows
IBM AIX
HP-UX
Linux (RedHat, SuSe, Debian etc)