Who Is Stephen Grant?

Who is Stephen Grant? He gives us some basics in the following excerpt from The River: A Pastor Stephen Grant Novel:

     “Sheriff, I understand your position, but you can spare the soothing crap, and the baseless promises. Before my pastor days, I was a SEAL and then CIA. I know the realities of situations like this. We need – or you need – to move quickly.”
     Hanson sighed. “SEAL, CIA, now a pastor – really?” He shook his head. “Anyway, you’re right. Moving quickly is what we’ve done...”