Most of my experience dealing with servers has been with print and dhcp servers within the windows environment with the occasional linux jump-box for enterprise network management. With these I have touched off and on going back to the days of NT 4.0, and have operated my own server environments at home for the sake of general familiarity and practice--primarily with Windows.
Have worked to a minor degree within a vSphere 5.5 and 6.5 environment, touching briefly on EMC & NetApp. I would say combined of one year experience, and pretty terrible experience with those in particular. Can navigate the systems and carry out tasks with the right design and plan.
This is not, I have to point out, my bread and butter, at all. But rough familiarity exists.
Recently I have gotten an R630, 128gb DDR4, ssd's, reds for storage on order, 20 core 2 cpu setup and have been working on getting a couple of game servers up with proxmox and linux since I don't want to bootleg the really good hypervisor and don't want to pay for a license either. Its another learning experience. Sort of like "I really need to find a way to soften the sound that comes out of this thing, wow."