Start networking. Once you have acquired sufficient experience, start offering your services as a consultant. You could make more money than your supervisors ever dreamed of.
Well, there's the rub--how do I acquire 'sufficient experience' waiting for someone to die so I can get promoted. I'm already the youngest engineer in my division, and I'm 40!
I'm not kidding, and this is true across the board in defense work: I'll be the Junior Guy until I'm 70.