Washington trade licensing

Aircraft Mechanic (A&P)

Services and inspects airframes and powerplants on aircraft: general aviation, airline, military.

Auto Body Technician

Repairs collision damage: panel replacement, frame straightening, refinishing.

Automotive Service Technician

Diagnoses, maintains, and repairs cars and light trucks: gasoline, diesel, and electric.

Boilermaker

Builds, installs, and repairs boilers, pressure vessels, and large tanks.

Carpenter

Frames, finishes, and builds structures from wood, steel, and composite materials.

[ ADJACENT ]

Diesel Mechanic

Services and repairs diesel engines in trucks, buses, and heavy equipment.

Electrician

Installs and maintains electrical systems in homes, commercial buildings, and industrial sites.

[ STATE LICENSE ]

Elevator Constructor

Installs, modernizes, and services elevators, escalators, and moving walkways.

[ STATE LICENSE ]

Glazier

Cuts, installs, and replaces glass in windows, storefronts, curtain walls, and skylights.

Heavy Equipment Mechanic

Services construction, mining, agricultural, and material-handling machinery.

HVAC Technician

Installs, maintains, and repairs heating, ventilation, air conditioning, and refrigeration systems.

Industrial Maintenance Technician

Keeps manufacturing equipment running: mechanical, electrical, and control system upkeep.

Ironworker

Erects structural steel, reinforces concrete with rebar, and installs metal decking and ornamental iron.

[ ADJACENT ]

Machinist

Makes precision metal parts using manual and CNC machine tools.

Mason

Lays brick, block, and stone for walls, foundations, chimneys, and veneers.

[ ADJACENT ]

Millwright

Installs, aligns, dismantles, and repairs heavy industrial machinery.

Operating Engineer

Operates heavy construction equipment: cranes, excavators, dozers, graders, loaders.

[ STATE LICENSE ]

Plumber

Installs and repairs water, waste, gas, and drainage systems in buildings.

[ STATE LICENSE ]

Sheet Metal Worker

Fabricates and installs ductwork, roofing, cladding, and architectural sheet metal.

Welder

Joins and cuts metal using arc, MIG, TIG, stick, and oxy-fuel processes.