Yes, it seems he was in brokering at around the same time Sheldon got into it ... used to work from his house in Woodbridge for many years but now looks like he moved to the OFTB.
I remember his trucks always had lots of chrome and long noses generally like Petes, Kenworths and Western Stars. If you look on the website, the gallery has pictures of trucks like that with Greg in some of the pictures. They're pretty old pictures though, so I'm wondering if he's strictly brokering now.
My only caveat is that the website looks like MTB's old website ... as long as Bill Masters isn't there, you should be fine.