Hi, and welcome to LQ!
Whether you need samba to connect to the company
machines or not depends on whether the network is
a MS domain or not. It could just as well be Novell
network for all we know :)
If it is a windows-network samba is the right tool, and
you almost certainly have it on your CDs for RH, no
need to download anything .... the website, however,
if you're after tutorials and documentation, is
http://www.samba.org
Cheers,
Tink