The job skills required for Machine Operator - $18-$21 /hr include background check, preventative maintenance, Innovation etc. Having related job skills and expertise will give you an advantage when applying to be a Machine Operator - $18-$21 /hr. That makes you unique and can impact how much salary you can get paid. Below are job openings related to skills required by Machine Operator - $18-$21 /hr. Select any job title you are interested in and start to search job requirements.