• Plant Mechanic

    Upstone Materials (Irwindale, CA)
    …just 25 miles east of Los Angeles. Virgin aggregate material is processed into sand and gravel through cutting-edge crushing and screening operations. To learn ... Job Summary Under the supervision of the Maintenance Foreman and/or Site Manager , the Plant Mechanic is responsible to work independently on all maintenance and… more
    Upstone Materials (06/15/25)
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  • Plant Mechanic Helper

    Upstone Materials (Irwindale, CA)
    …just 25 miles east of Los Angeles. Virgin aggregate material is processed into sand and gravel through cutting-edge crushing and screening operations. To learn ... Plant Mechanic Helper Company: UNITED ROCK PRODUCTS Location:...Under the supervision of the Maintenance Foreman and Site Manager , the Maintenance Mechanic Helper is responsible to work… more
    Upstone Materials (07/19/25)
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  • Plant Scale Clerk

    Upstone Materials (Irwindale, CA)
    …just 25 miles east of Los Angeles. Virgin aggregate material is processed into sand and gravel through cutting-edge crushing and screening operations. To learn ... Plant Scale Clerk Company: UNITED ROCK PRODUCTS Location:...of the Foreman who reports directly to the Site Manager , this role also has dotted line responsibility to… more
    Upstone Materials (08/01/25)
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  • Aggregate Foreman

    Upstone Materials (Irwindale, CA)
    …just 25 miles east of Los Angeles. Virgin aggregate material is processed into sand and gravel through cutting-edge crushing and screening operations. To learn ... areas which can include, but not limited to: dredge, plant , dust machines, support equipment, and lake areas. The...$43.95 Main Responsibilities + Reports directly to the Aggregate Manager and/or Superintendent + Ensures that production product is… more
    Upstone Materials (06/14/25)
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