Manufacturing

Rulmeca Canada Limited / International Association of Bridge, Structural, Ornamental and Reinforcing Iron Workers, Local 834

2021–2024 · ONA

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Safran Electronics Canada / International Association Of Machinists And Aerospace Workers, Local Lodge 905

2020–2023 · ONA

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Saint-Gobain Canada Inc. / Teamsters Local 1979, Chemical, Energy and Allied Workers

2021–2026 · Teamsters

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Salit Steel / United Steel, Paper And Forestry, Rubber, Manufacturing, Energy, Allied Industrial And Service Workers International Union, Local 4153

2024–2026 · ONA

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Schauenburg Industries Ltd. / United Steel, Paper And Forestry, Rubber, Manufacturing, Energy, Allied Industrial And Service Workers International Union, Local 2020

2020–2025 · ONA

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Schwartz Chemical Corporation / Teamsters Local Union 1979 Chemical, Energy and Allied Workers

2019–2024 · Teamsters

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Seasons Group And All Subsidiaries / Sheet Metal, Air, Rail And Transportation - SMART, Local 540

2021–2023

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Selkirk Canada Corporation / United Steel, Paper And Forestry, Rubber, Manufacturing, Energy, Allied Industrial And Service Workers International Union, Local 2020-51

2023–2026 · ONA

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Senior Flexonics (Canada) Limited / Sheet Metal Air Rail Transportation Local 540

2018–2023

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S. Gumpert of Canada Ltd. / United Food and Commercial Workers Canada, Local 175

2021–2026

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Shaw Almex Industries Limited / United Steelworkers, Local 2020-50

2025–2027 · USW

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Shelburne Wood Protection Ltd. / United Steel Workers Local 1-500

2021–2023

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Sheldons Engineering Division of Earlscourt Metal Industries Ltd. / Sheet Metal Workers' International Association, Local 30

2020–2023 · ONA

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Sheldons Engineering, Division of Earlscourt Metal Industries Ltd. / Sheet Metal Workers' International Association, Local 30

2023–2027 · ONA

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Shur Lok Products / Unifor and its Local 195

2024–2027 · Unifor

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Sivaco Ontario / Unifor and its Local 636

2022–2025 · Unifor

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Sleep Country Canada INC. / Workers United Canada Council on its behalf and on behalf of its Local 2757

2025–2028

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Smith and Long Contracting Ltd. / Sheet Metal Workers' International Association, Local 30

2025–2028 · ONA

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Snap-On Tools of Canada Ltd. / United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied Industrial and Service Workers International Union on behalf of its Local 9042

2021–2024 · ONA

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Soo Foundry & Machine (1980) Limited / United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied Industrial and Service Workers International Union (United Steelworkers)

2025–2028 · USW

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Southampton Flour Milling Inc. / United Food and Commercial Workers Canada, Local 175

2025–2028

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Specialty Machine & Fabrication and Great Lakes Fabricating / International Brotherhood Of Boilermakers, Iron Ship Builders, Blacksmiths, Forgers And Helpers, Lodge 128

2019–2024 · ONA

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Springwall Sleep Products Inc. / United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied Industrial and Service Workers International Union

2022–2025 · ONA

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Steed and Evans Limited / International Union of Operating Engineers, Local 793

2025–2028 · ONA

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Steel Speed 920919 Ontario Inc / International Union of Operating Engineers, Local 793

2023–2028 · ONA

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Stelco Inc. / United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied Industrial and Service Workers International Union (United Steelworkers)

2019–2024 · USW

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St Marys Cement Company / Unifor and its Local 222

2024–2027 · Unifor

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STM-Logistics and Manufacturing ULC / Unifor and its Local 200

2025–2028 · Unifor

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Stouffville Mobile Redimix / Teamsters Local Union No. 230

2021–2025 · Teamsters

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Sucro Can Canada Inc. / Labourers' International Union Of North America, Local 837

2020–2025 · ONA

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