Though good jobs are difficult to come by these days, the guy should not jump at the small fish at the risk of loosing the big one.
He should do a cost/benefit analysis of the situation, with special cognizance of the time he might need for a better job search and more importantly his vision. meaning if its a shift thing, he could still carve out time when off duty to look somewhere else, and the little coins from the security job would do some good in facilitating movement. otherwise, make the guy think well oh!
This na my own opinion.