A good trade to consider: welding. I recently visited Pioneer Pipe in the Utica and Marcellus shale area of Ohio and learned that last year the company paid 60 of its welders more than $150,000 and two of its welders over $200,000. The owner, Dave Archer, said he has had to turn down orders because he can't find enough skilled welders.
Market demands and worker shortages ultimately create pressure on wages. This applies to any profession with a set of highly specialized skills. Heavy equipment operators have also seen significant wage shifts.