my guess is that it doesn't really matter what profession he has, and what ever it was was left out by mistake (not unheard of)... just choose one for him and move on.
On page 17, the stat block for Lyle Benedict has a skill of Profession +5. Shouldn't he have a Profession in something?
I just checked the manuscript I submitted to Paizo. I didn't specify the profession there either. Hmmm...What do ya know?!
If I were you, I'd wait to see if he survives before deciding on a profession for him. If he lives, leaving that open might make it easier for you to recur him if you decide to do so.