Top 30 fastest-growing jobs by 2020
29. Pile-driver operators
Projected increase in 2020: 42.4 percent
Number employed in 2010: 41,900
Median pay in 2010: $36,640
Education/training:High school diploma and, typically, three years of classroom and on-the-job training.
Job outlook: Construction equipment operators who can use a wide variety of equipment will have the best prospects.