Vetted custodial staff with security clearances exist! As far as custodial pay goes, having a TS/SCI is probably going to put you in the top tier, it pays to stay out of trouble sometimes.
The security risk is a good reason to follow the advice of the article though - know your people. Also, badging and physical security.
The security risk is a good reason to follow the advice of the article though - know your people. Also, badging and physical security.