Systems Administration / Sysadmin
I've worked with Unix and Linux for 20+ years so have plenty of experience to address your sysadmin and indeed networking needs. I've worked regularly with large and small systems, both standalone and in more complex setups (clusters, server farms etc.). I work with many flavours of Unix and Linux (including Solaris, Red Hat, SuSE, Debian, BSD).
If you need to optimise your network or its applications, I can help. I am also familiar with scaling technologies - load balancing, server farms, clusters, NASes and the like.