No need to run a bitcoin client in order to mining.
Plug the Eruptor USB, install driver(if Windows), configure and run cgminer with a pool.
You forgot to tell him to call his company network administrator and ask him to look the other way when cgminer traffic goes through the HTTP proxy.
Mining pool hosts in the proxy reports will raise big red flags.
What, you mean that like 2kb of data every 10 seconds?