# Ontario trade certification records

## Construction sector trades (41)

| Code | Trade | Status |
| --- | --- | --- |
| 424A | [Architectural Glass and Metal Technician certification requirements](https://ontariocertificationregistry.ca/trades/424a-architectural-glass-and-metal-technician/) | VoluntaryExamRatioRed Seal |
| 401A | [Brick and Stone Mason certification requirements](https://ontariocertificationregistry.ca/trades/401a-brick-and-stone-mason/) | VoluntaryExamRatioRed Seal |
| 244G | [Cement (Concrete) Finisher certification requirements](https://ontariocertificationregistry.ca/trades/244g-cement-concrete-finisher/) | VoluntaryExamRatioRed Seal |
| 637C | [Concrete Pump Operator certification requirements](https://ontariocertificationregistry.ca/trades/637c-concrete-pump-operator/) | VoluntaryExam |
| 428A | [Construction Boilermaker certification requirements](https://ontariocertificationregistry.ca/trades/428a-construction-boilermaker/) | VoluntaryExamRatioRed Seal |
| 450A | [Construction Craft Worker certification requirements](https://ontariocertificationregistry.ca/trades/450a-construction-craft-worker/) | VoluntaryExamRed Seal |
| 426A | [Construction Millwright certification requirements](https://ontariocertificationregistry.ca/trades/426a-construction-millwright/) | VoluntaryExamRatio |
| 453A | [Drywall Finisher and Plasterer certification requirements](https://ontariocertificationregistry.ca/trades/453a-drywall-finisher-and-plasterer/) | VoluntaryExamRatioRed Seal |
| 451A | [Drywall, Acoustic and Lathing Applicator certification requirements](https://ontariocertificationregistry.ca/trades/451a-drywall-acoustic-and-lathing-applicator/) | VoluntaryExamRatioRed Seal |
| 309A | [Electrician - Construction and Maintenance certification requirements](https://ontariocertificationregistry.ca/trades/309a-electrician-construction-and-maintenance/) | CompulsoryExamRatioRed Seal |
| 309C | [Electrician - Domestic and Rural certification requirements](https://ontariocertificationregistry.ca/trades/309c-electrician-domestic-and-rural/) | CompulsoryExamRatio |
| 455A | [Exterior Insulated Finish Systems Mechanic certification requirements](https://ontariocertificationregistry.ca/trades/455a-exterior-insulated-finish-systems-mechanic/) | Voluntary |
| 448A | [Floor Covering Installer certification requirements](https://ontariocertificationregistry.ca/trades/448a-floor-covering-installer/) | VoluntaryExamRatioRed Seal |
| 403A | [General Carpenter certification requirements](https://ontariocertificationregistry.ca/trades/403a-general-carpenter/) | VoluntaryExamRatioRed Seal |
| 253H | [Hazardous Materials Worker certification requirements](https://ontariocertificationregistry.ca/trades/253h-hazardous-materials-worker/) | VoluntaryExam |
| 253A | [Heat and Frost Insulator certification requirements](https://ontariocertificationregistry.ca/trades/253a-heat-and-frost-insulator/) | VoluntaryExamRatioRed Seal |
| 636C | [Heavy Equipment Operator - Dozer certification requirements](https://ontariocertificationregistry.ca/trades/636c-heavy-equipment-operator-dozer/) | VoluntaryExamRed Seal |
| 636B | [Heavy Equipment Operator - Excavator certification requirements](https://ontariocertificationregistry.ca/trades/636b-heavy-equipment-operator-excavator/) | VoluntaryExamRed Seal |
| 636A | [Heavy Equipment Operator - Tractor Loader Backhoe certification requirements](https://ontariocertificationregistry.ca/trades/636a-heavy-equipment-operator-tractor-loader-backhoe/) | VoluntaryExamRed Seal |
| 339A | [Hoisting Engineer - Mobile Crane Operator 1 certification requirements](https://ontariocertificationregistry.ca/trades/339a-hoisting-engineer-mobile-crane-operator-1/) | CompulsoryExamRatioRed Seal |
| 339C | [Hoisting Engineer - Mobile Crane Operator 2 certification requirements](https://ontariocertificationregistry.ca/trades/339c-hoisting-engineer-mobile-crane-operator-2/) | CompulsoryExamRatio |
| 339B | [Hoisting Engineer - Tower Crane Operator certification requirements](https://ontariocertificationregistry.ca/trades/339b-hoisting-engineer-tower-crane-operator/) | CompulsoryExamRatioRed Seal |
| 420B | [Ironworker - Generalist certification requirements](https://ontariocertificationregistry.ca/trades/420b-ironworker-generalist/) | VoluntaryExamRatioRed Seal |
| 420A | [Ironworker - Structural and Ornamental certification requirements](https://ontariocertificationregistry.ca/trades/420a-ironworker-structural-and-ornamental/) | VoluntaryExamRatioRed Seal |
| 296A | [Native Residential Construction Worker certification requirements](https://ontariocertificationregistry.ca/trades/296a-native-residential-construction-worker/) | Voluntary |
| 404C | [Painter and Decorator - Commercial and Residential certification requirements](https://ontariocertificationregistry.ca/trades/404c-painter-and-decorator-commercial-and-residential/) | VoluntaryExamRatioRed Seal |
| 404D | [Painter and Decorator - Industrial certification requirements](https://ontariocertificationregistry.ca/trades/404d-painter-and-decorator-industrial/) | VoluntaryExamRatio |
| 306A | [Plumber certification requirements](https://ontariocertificationregistry.ca/trades/306a-plumber/) | CompulsoryExamRatioRed Seal |
| 434A | [Powerline Technician certification requirements](https://ontariocertificationregistry.ca/trades/434a-powerline-technician/) | VoluntaryExamRatioRed Seal |
| 244K | [Precast Concrete Erector certification requirements](https://ontariocertificationregistry.ca/trades/244k-precast-concrete-erector/) | VoluntaryRatio |
| 244L | [Precast Concrete Finisher certification requirements](https://ontariocertificationregistry.ca/trades/244l-precast-concrete-finisher/) | VoluntaryRatio |
| 313A | [Refrigeration and Air Conditioning Systems Mechanic certification requirements](https://ontariocertificationregistry.ca/trades/313a-refrigeration-and-air-conditioning-systems-mechanic/) | CompulsoryExamRatioRed Seal |
| 452A | [Reinforcing Rodworker certification requirements](https://ontariocertificationregistry.ca/trades/452a-reinforcing-rodworker/) | VoluntaryExamRatioRed Seal |
| 308R | [Residential (Low Rise) Sheet Metal Installer certification requirements](https://ontariocertificationregistry.ca/trades/308r-residential-low-rise-sheet-metal-installer/) | CompulsoryExamRatio |
| 313D | [Residential Air Conditioning Systems Mechanic certification requirements](https://ontariocertificationregistry.ca/trades/313d-residential-air-conditioning-systems-mechanic/) | CompulsoryExamRatio |
| 244H | [Restoration Mason certification requirements](https://ontariocertificationregistry.ca/trades/244h-restoration-mason/) | VoluntaryRatio |
| 449A | [Roofer certification requirements](https://ontariocertificationregistry.ca/trades/449a-roofer/) | VoluntaryExamRatioRed Seal |
| 308A | [Sheet Metal Worker certification requirements](https://ontariocertificationregistry.ca/trades/308a-sheet-metal-worker/) | CompulsoryExamRatioRed Seal |
| 427A | [Sprinkler and Fire Protection Installer certification requirements](https://ontariocertificationregistry.ca/trades/427a-sprinkler-and-fire-protection-installer/) | CompulsoryExamRatioRed Seal |
| 307A | [Steamfitter certification requirements](https://ontariocertificationregistry.ca/trades/307a-steamfitter/) | CompulsoryExamRatioRed Seal |
| 241A | [Terrazzo, Tile and Marble Setter certification requirements](https://ontariocertificationregistry.ca/trades/241a-terrazzo-tile-and-marble-setter/) | VoluntaryExamRatioRed Seal |

## Industrial sector trades (40)

| Code | Trade | Status |
| --- | --- | --- |
| 615A | [Bearings Mechanic certification requirements](https://ontariocertificationregistry.ca/trades/615a-bearings-mechanic/) | Voluntary |
| 600P | [Blacksmith certification requirements](https://ontariocertificationregistry.ca/trades/600p-blacksmith/) | Voluntary |
| 438A | [Cabinet Maker certification requirements](https://ontariocertificationregistry.ca/trades/438a-cabinet-maker/) | VoluntaryExamRed Seal |
| 670C | [Computer Numerical Control (CNC) Programmer certification requirements](https://ontariocertificationregistry.ca/trades/670c-computer-numerical-control-cnc-programmer/) | Voluntary |
| 670D | [Die Designer certification requirements](https://ontariocertificationregistry.ca/trades/670d-die-designer/) | Voluntary |
| 446A | [Electric Motor System Technician certification requirements](https://ontariocertificationregistry.ca/trades/446a-electric-motor-system-technician/) | VoluntaryExamRed Seal |
| 289F | [Electrician (Signal Maintenance) certification requirements](https://ontariocertificationregistry.ca/trades/289f-electrician-signal-maintenance/) | Voluntary |
| 636E | [Elevating Devices Mechanic certification requirements](https://ontariocertificationregistry.ca/trades/636e-elevating-devices-mechanic/) | Voluntary |
| 269E | [Entertainment Industry Power Technician certification requirements](https://ontariocertificationregistry.ca/trades/269e-entertainment-industry-power-technician/) | VoluntaryExam |
| 255W | [Facilities Mechanic certification requirements](https://ontariocertificationregistry.ca/trades/255w-facilities-mechanic/) | VoluntaryExam |
| 255B | [Facilities Technician certification requirements](https://ontariocertificationregistry.ca/trades/255b-facilities-technician/) | VoluntaryExam |
| 429A | [General Machinist certification requirements](https://ontariocertificationregistry.ca/trades/429a-general-machinist/) | VoluntaryExamRed Seal |
| 277Z | [Hydraulic/Pneumatic Mechanic certification requirements](https://ontariocertificationregistry.ca/trades/277z-hydraulic-pneumatic-mechanic/) | Voluntary |
| 442A | [Industrial Electrician certification requirements](https://ontariocertificationregistry.ca/trades/442a-industrial-electrician/) | VoluntaryExamRed Seal |
| 433A | [Industrial Mechanic Millwright certification requirements](https://ontariocertificationregistry.ca/trades/433a-industrial-mechanic-millwright/) | VoluntaryExamRed Seal |
| 447A | [Instrumentation and Control Technician certification requirements](https://ontariocertificationregistry.ca/trades/447a-instrumentation-and-control-technician/) | VoluntaryExamRed Seal |
| 259L | [Locksmith certification requirements](https://ontariocertificationregistry.ca/trades/259l-locksmith/) | Voluntary |
| 430M | [Machine Tool Builder and Integrator certification requirements](https://ontariocertificationregistry.ca/trades/430m-machine-tool-builder-and-integrator/) | VoluntaryExam |
| 437A | [Metal Fabricator (Fitter) certification requirements](https://ontariocertificationregistry.ca/trades/437a-metal-fabricator-fitter/) | VoluntaryExamRed Seal |
| 431A | [Mould Maker certification requirements](https://ontariocertificationregistry.ca/trades/431a-mould-maker/) | VoluntaryExam |
| 225A | [Optics Technician (Lens and Prism Maker) certification requirements](https://ontariocertificationregistry.ca/trades/225a-optics-technician-lens-and-prism-maker/) | Voluntary |
| 609C | [Packaging Machine Mechanic certification requirements](https://ontariocertificationregistry.ca/trades/609c-packaging-machine-mechanic/) | Voluntary |
| 443A | [Pattern Maker certification requirements](https://ontariocertificationregistry.ca/trades/443a-pattern-maker/) | VoluntaryExam |
| 456P | [Pressure Systems Welder certification requirements](https://ontariocertificationregistry.ca/trades/456p-pressure-systems-welder/) | VoluntaryExam |
| 246T | [Process Operator - Food Manufacturing certification requirements](https://ontariocertificationregistry.ca/trades/246t-process-operator-food-manufacturing/) | Voluntary |
| 246R | [Process Operator - Power certification requirements](https://ontariocertificationregistry.ca/trades/246r-process-operator-power/) | Voluntary |
| 246F | [Process Operator - Refinery, Chemical and Liquid Processes certification requirements](https://ontariocertificationregistry.ca/trades/246f-process-operator-refinery-chemical-and-liquid-processes/) | Voluntary |
| 268R | [Railway Car Technician certification requirements](https://ontariocertificationregistry.ca/trades/268r-railway-car-technician/) | VoluntaryExam |
| 288R | [Relay and Instrumentation Technician certification requirements](https://ontariocertificationregistry.ca/trades/288r-relay-and-instrumentation-technician/) | Voluntary |
| 611B | [Saw Filer/Fitter certification requirements](https://ontariocertificationregistry.ca/trades/611b-saw-filer-fitter/) | Voluntary |
| 278B | [Surface Blaster certification requirements](https://ontariocertificationregistry.ca/trades/278b-surface-blaster/) | VoluntaryExam |
| 630B | [Surface Mount Assembler certification requirements](https://ontariocertificationregistry.ca/trades/630b-surface-mount-assembler/) | Voluntary |
| 225F | [Thin Film Technician certification requirements](https://ontariocertificationregistry.ca/trades/225f-thin-film-technician/) | Voluntary |
| 602C | [Tool and Cutter Grinder certification requirements](https://ontariocertificationregistry.ca/trades/602c-tool-and-cutter-grinder/) | Voluntary |
| 430A | [Tool and Die Maker certification requirements](https://ontariocertificationregistry.ca/trades/430a-tool-and-die-maker/) | VoluntaryExamRed Seal |
| 239B | [Tool and Gauge Inspector certification requirements](https://ontariocertificationregistry.ca/trades/239b-tool-and-gauge-inspector/) | Voluntary |
| 630T | [Tool/Tooling Maker certification requirements](https://ontariocertificationregistry.ca/trades/630t-tool-tooling-maker/) | VoluntaryExam |
| 638A | [Tractor-Trailer Commercial Driver certification requirements](https://ontariocertificationregistry.ca/trades/638a-tractor-trailer-commercial-driver/) | Voluntary |
| 605B | [Water Well Driller certification requirements](https://ontariocertificationregistry.ca/trades/605b-water-well-driller/) | Voluntary |
| 456A | [Welder certification requirements](https://ontariocertificationregistry.ca/trades/456a-welder/) | VoluntaryExamRed Seal |

## Motive power sector trades (19)

| Code | Trade | Status |
| --- | --- | --- |
| 425A | [Agricultural Equipment Technician certification requirements](https://ontariocertificationregistry.ca/trades/425a-agricultural-equipment-technician/) | VoluntaryExamRed Seal |
| 310E | [Alignment and Brakes Technician certification requirements](https://ontariocertificationregistry.ca/trades/310e-alignment-and-brakes-technician/) | CompulsoryExam |
| 310B | [Auto Body and Collision Damage Repairer certification requirements](https://ontariocertificationregistry.ca/trades/310b-auto-body-and-collision-damage-repairer/) | CompulsoryExamRed Seal |
| 310Q | [Auto Body Repairer certification requirements](https://ontariocertificationregistry.ca/trades/310q-auto-body-repairer/) | CompulsoryExam |
| 310K | [Automotive Electronic Accessory Technician certification requirements](https://ontariocertificationregistry.ca/trades/310k-automotive-electronic-accessory-technician/) | CompulsoryExam |
| 274L | [Automotive Glass Technician certification requirements](https://ontariocertificationregistry.ca/trades/274l-automotive-glass-technician/) | Voluntary |
| 410N | [Automotive Painter certification requirements](https://ontariocertificationregistry.ca/trades/410n-automotive-painter/) | VoluntaryExamRed Seal |
| 310S | [Automotive Service Technician certification requirements](https://ontariocertificationregistry.ca/trades/310s-automotive-service-technician/) | CompulsoryExamRed Seal |
| 421A | [Heavy Duty Equipment Technician certification requirements](https://ontariocertificationregistry.ca/trades/421a-heavy-duty-equipment-technician/) | VoluntaryExamRed Seal |
| 435B | [Marine Engine Technician certification requirements](https://ontariocertificationregistry.ca/trades/435b-marine-engine-technician/) | VoluntaryExam |
| 410K | [Motive Power Machinist certification requirements](https://ontariocertificationregistry.ca/trades/410k-motive-power-machinist/) | VoluntaryExam |
| 310G | [Motorcycle Technician certification requirements](https://ontariocertificationregistry.ca/trades/310g-motorcycle-technician/) | CompulsoryExamRed Seal |
| 282E | [Powered Lift Truck Technician certification requirements](https://ontariocertificationregistry.ca/trades/282e-powered-lift-truck-technician/) | VoluntaryExam |
| 690H | [Recreation Vehicle Technician certification requirements](https://ontariocertificationregistry.ca/trades/690h-recreation-vehicle-technician/) | VoluntaryExamRed Seal |
| 435A | [Small Engine Technician certification requirements](https://ontariocertificationregistry.ca/trades/435a-small-engine-technician/) | VoluntaryExam |
| 310D | [Transmission Technician certification requirements](https://ontariocertificationregistry.ca/trades/310d-transmission-technician/) | CompulsoryExam |
| 310T | [Truck and Coach Technician certification requirements](https://ontariocertificationregistry.ca/trades/310t-truck-and-coach-technician/) | CompulsoryExamRed Seal |
| 310J | [Truck-Trailer Service Technician certification requirements](https://ontariocertificationregistry.ca/trades/310j-truck-trailer-service-technician/) | CompulsoryExamRed Seal |
| 421C | [Turf Equipment Technician certification requirements](https://ontariocertificationregistry.ca/trades/421c-turf-equipment-technician/) | Voluntary |

## Service sector trades (19)

| Code | Trade | Status |
| --- | --- | --- |
| 445A | [Appliance Service Technician certification requirements](https://ontariocertificationregistry.ca/trades/445a-appliance-service-technician/) | VoluntaryExamRed Seal |
| 444A | [Arborist certification requirements](https://ontariocertificationregistry.ca/trades/444a-arborist/) | VoluntaryExam |
| 415B | [Assistant Cook certification requirements](https://ontariocertificationregistry.ca/trades/415b-assistant-cook/) | Voluntary |
| 423A | [Baker certification requirements](https://ontariocertificationregistry.ca/trades/423a-baker/) | VoluntaryRed Seal |
| 423C | [Baker-Patissier certification requirements](https://ontariocertificationregistry.ca/trades/423c-baker-patissier/) | VoluntaryExamRed Seal |
| 415C | [Chef certification requirements](https://ontariocertificationregistry.ca/trades/415c-chef/) | Voluntary |
| 620A | [Child and Youth Worker certification requirements](https://ontariocertificationregistry.ca/trades/620a-child-and-youth-worker/) | Voluntary |
| 620C | [Child Development Practitioner certification requirements](https://ontariocertificationregistry.ca/trades/620c-child-development-practitioner/) | Voluntary |
| 415A | [Cook certification requirements](https://ontariocertificationregistry.ca/trades/415a-cook/) | VoluntaryExamRed Seal |
| 620D | [Developmental Services Worker certification requirements](https://ontariocertificationregistry.ca/trades/620d-developmental-services-worker/) | Voluntary |
| 620E | [Educational Assistant certification requirements](https://ontariocertificationregistry.ca/trades/620e-educational-assistant/) | Voluntary |
| 332A | [Hairstylist certification requirements](https://ontariocertificationregistry.ca/trades/332a-hairstylist/) | CompulsoryExam |
| 219D | [Horse Harness Maker certification requirements](https://ontariocertificationregistry.ca/trades/219d-horse-harness-maker/) | Voluntary |
| 441C | [Horticultural Technician certification requirements](https://ontariocertificationregistry.ca/trades/441c-horticultural-technician/) | VoluntaryExamRed Seal |
| 415D | [Institutional Cook certification requirements](https://ontariocertificationregistry.ca/trades/415d-institutional-cook/) | VoluntaryExam |
| 296B | [Native Clothing and Crafts Artisan certification requirements](https://ontariocertificationregistry.ca/trades/296b-native-clothing-and-crafts-artisan/) | Voluntary |
| 631A | [Network Cabling Specialist certification requirements](https://ontariocertificationregistry.ca/trades/631a-network-cabling-specialist/) | VoluntaryExam |
| 240P | [Parts Technician certification requirements](https://ontariocertificationregistry.ca/trades/240p-parts-technician/) | VoluntaryExamRed Seal |
| 444B | [Utility Arborist certification requirements](https://ontariocertificationregistry.ca/trades/444b-utility-arborist/) | VoluntaryExam |

## Official verification sources

- Regulation[O. Reg. 876/21, Prescribed Trades and Related Matters (e-Laws)](https://www.ontario.ca/laws/regulation/210876)
- Participation data[Ontario open data: Apprenticeships dataset](https://data.ontario.ca/dataset/apprenticeships)Compulsory status, certifying exam requirement and apprentice ratio for every trade below are read directly from O. Reg. 876/21 as consolidated on e-Laws. Trade codes and apprentice counts come from Ontario's published apprenticeships dataset.

## Prescribed trades without a record here (14)

These are prescribed trades under O. Reg. 876/21 with an official trade code, but Ontario publishes nothing describing the work, the training hours or the exam for them, and they are not Red Seal trades. Rather than publish a page that only repeats the trade's name, they are listed here. Check [Skilled Trades Ontario](https://www.skilledtradesontario.ca/) for the current position on any of them.

| Code | Trade | Sector | Compulsory |
| --- | --- | --- | --- |
| 640D | Agricultural - Dairy Herdsperson | Service | No |
| 640F | Agricultural - Fruit Grower | Service | No |
| 640S | Agricultural - Swine Herdsperson | Service | No |
| 416E | Electronic Service Technician | Service | No |
| 606G | Gemsetter/Goldsmith | Service | No |
| 600H | Horse Groom | Service | No |
| 634E | Information Technology - Contact Centre Customer Service Agent | Service | No |
| 634D | Information Technology - Contact Centre Sales Agent | Service | No |
| 634A | Information Technology - Contact Centre Technical Support Agent | Service | No |
| 634B | Information Technology - Hardware Technician | Service | No |
| 634C | Information Technology - Network Technician | Service | No |
| 630A | Micro Electronics Manufacturer | Service | No |
| 245R | Retail Meat Cutter | Service | No |
| 219C | Saddlery | Service | No |

## Workplace fatalities and injuries

Ontario publishes worker fatality and critical injury counts by sector rather than by trade. See [fatalities and critical injuries in Ontario by sector, 2015 to 2024](https://ontariocertificationregistry.ca/trades/safety/), with the reporting caveats that come with those numbers.

## Looking for the compulsory trades?

23 of Ontario's 144 prescribed trades are compulsory, meaning certification is required by law to work in them. The full list, including trades outside the construction and industrial sectors, is on the [compulsory trades in Ontario](https://ontariocertificationregistry.ca/trades/compulsory/) page.

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Source: https://ontariocertificationregistry.ca/trades/