Vako, thanks for the reply you are correct, your patience is appreciated, as I don't want to disclose any of the parities involved, or be to descriptive.
My concerns are that this 'company' has the potential to view or intercept email (outlook exchange client). This information would provide inside information on how bidding would be done in future contracts against multiple competitors. These accounts affect up 50-80% of their overall business within a years period.
Possibly the heightened awareness of computer security has made me more alert to my surroundings, and this maybe nothing at all. The thing that stands out is when the buffalo router was installed I asked the IT manager why the change, it was a linksys N router set to wpa/wpa2 security. He stated he was concenred about security of that model of router which sounded feasible. But when I connected to the network the security was set to WEP, and the surrounding WAPs were set to wpa/wpa2. I inquired as to which was more secure(i knew already) he told me WEP. Maybe this is to separate my connection from the internal network as you pointed out. Additionally my pointer behaves erraticly and seems to have a mind of its own. It usually stops after ~3 seconds of me moving the pointer, this does not happen if Im not connected. The little decaffinateID applet did detect a change in the mac address and warned of a new ip in the cache? not 100% sure what this is, the mac address does concern me, the new ip in the cache could be from a https site or other request that I initiated?
I have taken the security measures you suggested, I have installed linux mint and use it as much as possible but have some programs that cant run on linux even with the wine emulator. I have started connecting only when needed and disconnecting once complete.
I did discuss direct VPN with my cooperate office to resolve, currenlty this is not feasible. Admin has explained that the overseas servers have been taxed out to the point affecting speed. Additional servers are being added in USA to alleviate the load, once this phase is completed (3-6 months) a direct VPN will be available. As I mentioned before the admin suggested the GSM air card as an alternative? Is this really secure?
If you have any more suggestions, let me know.