It depends. When I was at IBM I worked on a small team and we had about 4000 VMs/systems I was the Network Guy, the Storage Guy, the VMware Guy, the Windows Guy, the Linux Guy, the AIX guy, the AS/400 guy, and the Security Guy. Gees now that I think about it, no wonder I was so stressed out back them.

I learned a lot from that job and it opened a lot of doors for me in my career.