I’ve had the privilege to work for a healthcare company and have receieved the following experience while working there. I’m still working for this company, and am still learning. However I will never say I know everything about any of these software.

VMWare ESX

VMWare Server

RightFax

Bluecoat Proxy SG and AV

RIM Blackberry Enterprise Server

ZixVPM email encryption

Solarwinds

Active Directory and Exchange

Websense email filter

Symantec Backup Exec

Symantec Anti-Virus

Microsoft Virtual Machines

GFI Email Filter

Symantec Livestate

Network Intelligence

Acronis

GFI Languard

SQL Server 2000 and 2005