grey-collar refers to the balance of employed people not classified as white- or blue collar. although grey-collar is sometimes used to describe those who work beyond the age of retirement, it is also used to refer to occupations that incorporate some of the elements of both blue- and white-collar, or are completely different from both categories.
examples of grey collar industries:
farming, fishing, forestry, and other forms of agribusiness
health care, aged care, child care, and the personal service sector
protective services and security
food preparation and the catering industry
skilled trades, technicians, etc.
grey-collar workers often have associate degrees from a community college in a particular field. they are unlike blue-collar workers in that blue-collar workers can often be trained on the job within several weeks whereas grey-collar workers already have a specific skill set.