As a carrier its very difficult to just train and get hired. Those who ar good at hacking do it for passion not money. Like anthony said, you get hired thru your track record not qualifications most of the times jus like the current advisor on security for Obama. The guy was well known underground hacker and had a reputation.
Its fun to mention that l also thought l wanted to be a hacker soon after l finished a A+ course. So l responded and went to a college which l thought can train me.
The guys there were very nice and they took me thru paces to gauge my skills. I had none, thus how l started learning networking, security and voip.
Now lm very clear hacking is not my thing!!
Hopefully this will help