• 2002 employment: 7,000
• Projected 2002-12 employment change: About as fast as average
• Most significant source of training: Moderate-term on-the-job training

Commercial divers
Work below surface of water, using scuba gear to inspect, repair, remove, or install equipment and structures. May use a variety of power and hand tools, such as drills, sledgehammers, torches, and welding equipment. May conduct tests or experiments, rig explosives, or photograph structures or marine life. Excludes fishers and related fishing workers, athletes and sports competitors, and police and sheriff's patrol officers.

• 2002 employment: 4,500
• Projected 2002-12 employment change: About as fast as average
• Most significant source of training: Moderate-term on-the-job training

Control valve installers and repairers, except mechanical door
Install, repair, and maintain mechanical regulating and controlling devices, such as electric meters, gas regulators, thermostats, safety and flow valves, and other mechanical governors.

• 2002 employment: 38,000
• Projected 2002-12 employment change: About as fast as average
• Most significant source of training: Moderate-term on-the-job training

Fabric menders, except garment
Repair tears, holes, and other defects in fabrics, such as draperies, linens, parachutes, and tents.

• 2002 employment: 2,400
• Projected 2002-12 employment change: A decline
• Most significant source of training: Moderate-term on-the-job training

First-line supervisors/managers of mechanics, installers, and repairers
Supervise and coordinate the activities of mechanics, installers, and repairers. Excludes team or work leaders.

• 2002 employment: 444,000
• Projected 2002-12 employment change: About as fast as average
• Most significant source of training: Work experience in a related occupation

Helpers—installation, maintenance, and repair workers
Help installation, maintenance, and repair workers in maintenance, parts replacement, and repair of vehicles, industrial machinery, and electrical and electronic equipment. Perform duties, such as furnishing tools, materials, and supplies to other workers; cleaning work area, machines, and tools; and holding materials or tools for other workers.

• 2002 employment: 150,000
• Projected 2002-12 employment change: About as fast as average
• Most significant source of training: Short-term on-the-job training

Locksmiths and safe repairers
Repair and open locks; make keys; change locks and safe combinations; and install and repair locks.

• 2002 employment: 23,000
• Projected 2002-12 employment change: Faster than average
• Most significant source of training: Moderate-term on-the-job training

Manufactured building and mobile home installers
Move or install homes or prefabricated buildings.

• 2002 employment: 18,000
• Projected 2002-12 employment change: Faster than average
• Most significant source of training: Moderate-term on-the-job training

Mechanical door repairers
Install, service, or repair opening and closing mechanisms of automatic doors and hydraulic door closers. Includes garage door mechanics.

• 2002 employment: 11,000
• Projected 2002-12 employment change: Faster than average
• Most significant source of training: Moderate-term on-the-job training

Recreational vehicle service technicians
Diagnose, inspect, adjust, repair, or overhaul recreational vehicles including travel trailers. May specialize in maintaining gas, electrical, hydraulic, plumbing, or chassis/towing systems as well as repairing generators, appliances, and interior components. Includes workers who perform customized van conversions. Excludes automotive service technicians and mechanics, and bus and truck mechanics and diesel engine specialists who also work on recreation vehicles.

• 2002 employment: 13,000
• Projected 2002-12 employment change: Faster than average
• Most significant source of training: Long-term on-the-job training

Refractory materials repairers, except brickmasons
Build or repair furnaces, kilns, cupolas, boilers, converters, ladles, soaking pits, ovens, etc., using refractory materials.

• 2002 employment: 3,600
• Projected 2002-12 employment change: More slowly than average
• Most significant source of training: Moderate-term on-the-job training

Riggers
Set up or repair rigging for construction projects, manufacturing plants, logging yards, ships and shipyards, or for the entertainment industry.

• 2002 employment: 14,000
• Projected 2002-12 employment change: About as fast as average
• Most significant source of training: Short-term on-the-job training

Security and fire alarm systems installers
Install, program, maintain, and repair security and fire alarm wiring and equipment. Ensure that work is in accordance with relevant codes. Excludes electricians who do a broad range of electrical wiring.

• 2002 employment: 46,000
• Projected 2002-12 employment change: Faster than average
• Most significant source of training: Postsecondary vocational award

Signal and track switch repairers
Install, inspect, test, maintain, or repair electric gate crossings, signals, signal equipment, track switches, section lines, or intercommunications systems within a railroad system.

• 2002 employment: 7,900
• Projected 2002-12 employment change: A decline
• Most significant source of training: Moderate-term on-the-job training

Tire repairers and changers
Repair and replace tires.

• 2002 employment: 83,000
• Projected 2002-12 employment change: More slowly than average
• Most significant source of training: Short-term on-the-job training