Railway yard workers regulate yard traffic, couple and uncouple trains and perform related yard activities. Railway track maintenance workers operate machines and equipment to lay, maintain and repair railway tracks. They are employed by railway transport companies.

Water transport deck and engine room crew stand watch, operate and maintain deck equipment, perform other deck and bridge duties and assist ship engineer officers to operate, maintain and repair engines, machinery and auxiliary equipment aboard ships or self-propelled vessels. They are employed by marine transportation companies and federal government departments.

Air transport ramp attendants operate ramp-servicing vehicles and equipment, handle cargo and baggage and perform other ground support duties at airports. They are employed by airline and air services companies and the federal government.

Automotive and heavy truck and equipment parts installers and servicers install replacement automotive mechanical parts such as mufflers, exhaust pipes, shock absorbers, springs and radiators and perform routine maintenance service such as oil changes, lubrication and tire repairs on automobiles, trucks and heavy equipment. They are employed by automobile and truck service and repair shops, service departments of industrial establishments and construction, mining and logging companies.

Utility maintenance workers locate, repair, install and perform maintenance work to various equipment and facilities, such as water filtration and distribution plants, waste water treatment plants and power plants. They may also work on exterior and underground gas mains and distribution lines. They are employed by municipal, provincial and federal public works departments, private contractors under contract with government public works departments and gas distribution companies.

Public works maintenance equipment operators and related workers operate vehicles and equipment to maintain streets, highways and sewer systems and operate trucks to collect garbage and recyclable materials. This unit group also includes workers who clear vegetation close to power lines. They are employed by municipal, provincial and federal public works departments, private contractors under contract with government public works departments and private companies involved in the collection of refuse and recyclable materials.