Contractors and supervisors in mechanic trades supervise and coordinate the activities of workers classified in unit groups within the following minor groups: Machinery and transportation equipment mechanics (except motor vehicle) (7240), Automotive service technicians (7241) and Small motor, engine and equipment mechanics and related repairers (including electrical components) (7242). They are employed in a wide range of establishments; places of employment are indicated in the unit group descriptions of the above minor groups. Contractors may be self-employed.

Contractors and supervisors of heavy equipment operator crews supervise and coordinate the activities of workers classified in the following unit groups: Crane operators (72500), Water well drillers (72501), Heavy equipment operators (73400), Drillers and blasters – surface mining, quarrying and construction (73402), Railway yard and track maintenance workers (74200), Public works maintenance equipment operators and related workers (74205), Longshore workers (75100), Material handlers (75101), and Public works and maintenance labourers (75212). 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.

Supervisors of workers in printing and related occupations supervise and coordinate the activities of workers who produce camera work and printing plates and cylinders, process film, print text and illustrations on paper, metal and other material, and bind and finish printed products. They are employed by companies that specialize in commercial printing or one of its components, such as binding or colour reproduction, in combined printing and publishing companies, such as newspapers and magazines, and in various establishments in both the public and private sectors that have in-house printing departments.

Supervisors of railway transport operations supervise and coordinate the activities of railway and yard locomotive engineers, railway yard workers and railway labourers. They are employed by railway transport companies.

Supervisors of motor transport and other ground transit operators supervise and coordinate activities of truck drivers, bus drivers, delivery drivers, subway and other transit operators, chauffeurs and taxi and limousine drivers. This unit group also includes bus dispatchers who coordinate the activities of transit system bus drivers and subway traffic controllers who operate and monitor signal and track switch control panels. They are employed by motor transportation and ground transit companies and by urban transit systems.

Supervisors in mail and message distribution supervise and coordinate the activities of workers in the following unit groups: Postal services representatives (64401), Letter carriers (74101), Mail and parcel sorters and related occupations (74100) and Couriers and messengers (74102). They are employed by Canada Post Corporation, courier companies, governments and large corporations.