Contractors and supervisors of heavy equipment operator crews supervise and co-ordinate the activities of workers classified in the following unit groups: Crane operators (7371), Drillers and blasters – surface mining, quarrying and construction (7372), Water well drillers (7373), Longshore workers (7451), Material handlers (7452), Heavy equipment operators (except crane) (7521), Public works maintenance equipment operators and related workers (7522), Railway yard and track maintenance workers (7531), and Public works and maintenance labourers (7621). They are employed in a wide range of establishments; places of employment are indicated in the above unit group descriptions. Contractors may be self-employed.
Small businesses' contractors may execute tasks within their trade area of expertise, which is generally not the case for supervisors or contractors associated with a medium or large business.
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