Grim--

You're accepted on the condition that you change up the end of your CS. The railway job isn't supposed to be public knowledge, so there's really no way he'd have found out about it. MAYBE in New Vegas there'd be whispers about something coming out of the Lucky 38, but all the way in New Reno there wouldn't be any reason for them to know about it. 

Basically, just come up with a reason for your guy to be in New Reno when we get there and then we'll write in a way to cross paths that makes sense.