I've often wondered this, I've never known of any association to a top MMA gym. Doesn't he train with Erik Paulson? Can't remember where I read that (if at all).
He did at one time train at CSW under Eric alongside guys like Hector Lombard (the got into it hard) and Babalu. I don't believe he still trains there though, I know he has been helping Bobby Lashley prepare for his last couple fights and Eric Prindle worked with him to prepare for his cancelled fight with Thiago Santos.