21. Derrick operators (oil and gas)

Oil and gas derrick operators rig derrick equipment and operate pumps to circulate mud through a drill hole.

Median annual salary: $48,130

Overall unhealthiness score: 56.0

Top three health risks:

1. Exposure to contaminants: 100

2. Exposure to minor burns, cuts, bites, or stings: 93

3. Exposure to hazardous conditions: 91