• 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 ... Plant Mechanic Company: UNITED ROCK PRODUCTS Location: Irwindale...or difficult in depth repairs with Foreman and/or Site Manager . + Performs routine scheduled maintenance as outlined by… more
    Upstone Materials (08/27/25)
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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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