.... of or relating to manual work or workers, particularly in industry.
"their speech and attitudes mark them as blue-collar guys" Definition by Google
New Career opportunities
'Joseph Poole will make more than $100,000 in wages and
overtime by the end of the year.
By 2017, an estimated 2.5 million new, middle-skill jobs like Poole's
are expected to be added to the workforce,
accounting for nearly 40% of all job growth,
according to a USA TODAY analysis ....' by USA Today