Currently I am totally involved in our VCE VBlock Administration using VMware virtualization environment on Cisco UCS blade servers, converged network infrastructure with multiple data centers configured in a HA / DRS arrangement using multiple metro clusters, VPlex for storage redundancy, OTV for network consistency between data centers. We also have numerous remote virtual stand-alone VM hosts. The systems run hundreds of virtual machines.
I am still heavily involved as a Linux system administrator as the growing base of applications and processes that run on some form of Linux needs setup and ongoing attention.
I still try to keep up to date on the networking and current configurations that could affect my particular portion of servers and systems.