Well, for starters...
Preventive maintenance, safety, NEC.
Troubleshooting motor controls, programming PLC's and VFD's.
Be willing to kiss your home life goodby for the sake of every 'crises' that comes along. Demonstrate that you are always spending your free time learning new things about your electrical trade.
Demonstrate a history of getting along with all types of people, and not losing your cool when stressed out.
Demonstrate that you are quite willing to be one of the grunts, not some know-it-all that is too good to do the menial tasks, and that you really like the long term diversity that you get to experience from maintenance work. Somehow get the point across that you are planning to stay around a while.