If you have access to the Server admin tool downloaded from the web interface, you can use the tool to handle uploads of files to the server from your local computer without needing any direct access to the server at the OS level.
In fact, uploading files via the Server Admin panel is considered more reliable, as it takes care of permissions in the files as they upload.
I worked over 2 years without any direct access to the FM Server machine's OS or directories, using the Server Admin panel -- no problems. That panel also handles the FM server configuration and schedules. (The only time I needed IT intervention was to retrieve backup files from the Server for offline testing.)
Thanks Stephen! Sounds like I am all set. We should have everything installed as of next week fingers crossed.
I assume from your "2yr " comment that this also applies to earlier versions? Say 10 & 11?
Yep, I did server admin in-house on FM 10, 11, and 12 with just the Server Admin panel as downloaded from the standard local-host location covered in the Getting Started server manual.