HyFives,
What do you have to lose by giving this a try? I pull a trailer with a GVW of 7200 with my "little" half ton Tundra. Folks on this forum say over and over again it won't work. I especially love the response, "Can you pull it, yes but will you be happy pulling it?" Unless you have a heavy duty 3/4 ton diesel, you should just stay home on the weekends.
Towing anything at the limit of the specs will always be a bit iffy. In these cases it would serve you well to really look at how you plan to use your trailer. Are you the type to load the truck heavily with toys, wood, generators and such? Do you drive fast and want to speed up the hills? Well, if so, then you do need to heed the "advice" given by the bigger is better crowd. If not then I would say that the company truck will work for you. Is there a way you can give this a try? What is the chance of talking your boss into a slightly better truck?