Hey guys, as the titles states, while I work on my Certs and possibly go back to school to work on my BA in (Networking/Administration) or (Security) still deciding

how does one move into a systems Administrator role what skills are needed/required?
I have done everything from helpdesk, desktop support, some AD, patch management, corporate antivirus/firewall, System backups, etc etc list go's on. I would definitely say I am mid level in my career (10 yrs) but would like to have a role where I can touch on more programs I have not had a chance too.
I also figured this would help as well decide if I want to go the Cisco or Microsoft route.
Thoughts and opinions?