i’m a consultant… so any consulting work… and then full time work, network admin, systems admin, active directory engineer, project implementation engineer, windows engineer, linux / unix / VMware admin…ect
typically they just clump whatever job they have open under ‘systems admin’ then list the particulars they want… … i’m serious… tons of jobs.
DBA’s and Exchange admins are another whole different realm of jobs as are any datacom people, mainframe, and application specialists…