white-collar
a white-collar worker is someone who works in an office, doing mental rather than physical work.
The ratio of white-collar workers to production workers in the American manufacturing industry was declining. (always before noun)
The earnings of women in white-collar jobs are the second highest in Britain.
The 1980's saw an explosion in white-collar crime. (= crimes committed by white-collar workers, especially stealing from the organization they work for)