Quality Control Technician

  • Knife River
  • Kahului, Hawaii
  • Full Time

Minimum Requirements

  • High school graduate or GED equivalent.
  • Valid Hawaii State driver’s license.
  • Maintain proper certifications, licensure and acceptable driving record (where applicable)
  • Able to operate testing machines and equipment.
  • High ethical and moral standards.

Duties and Responsibilities

  • Obtain samples and perform necessary tests on various concrete and aggregate products. Compares results against job specifications. Provides advice on remedial action if materials do not meet specifications.
  • Visually inspects aggregate, sand, and other materials being produced or stored at mills, plants or quarries to ascertain quality.
  • Assist in preparing concrete mix designs, preparing trial batches and aggregate submittals.
  • Assist mixer drivers in determining quality and consistency of concrete.
  • Make adjustments on materials and check batching and mixing of concrete.
  • Advise production supervisors as to the quality of concrete aggregate manufactured at the respective quarries.
  • Prepares samples of products for customers and testing laboratories and may deliver to assure safe arrival.
  • Prepares mix designs and batch plant cards for the concrete division.
  • Conduct tests related to checking concrete yields on the batch plant. Adjusts the batch plant weights to compensate for changes in material moisture content and specific gravity.
  • Makes concrete test cylinders and conducts tests to measure strength of concrete.
  • Records and maintains test data and other required information. This includes both written records and data input into a personal computer.
  • Performs necessary housekeeping functions in laboratory area.
  • Performs daily maintenance on lab and test equipment.
  • Performs duties in an approved and safe manner.
  • Any additional tasks and responsibilities that may be assigned.
  • Always work safely and take action to prevent any and all unsafe actions, processes, and behaviors.

Knowledge, Skills, and Abilities

  • Works in varying environments from air-conditioned offices, to hot, dusty, muddy field conditions.
  • Must be able to stand for long periods of time.
  • Must be able to climb ladders and stairs, and withstand heights.
  • Must be able to lift and carry materials to be tested weighing up to 60 pounds.
  • Must possess a valid Hawaii State Driver’s License and be able to drive an automobile or pick-up truck.
  • Must be able to use a wheelbarrow, loaded with up to three cubic feet (approximately 450 pounds) of ready-mix concrete.
  • Operates concrete testing equipment and other office equipment
  • Must be able to work overtime and on weekends, as required.
  • Must be able to meet tight project deadlines while maintaining quality results in their work.
  • Competency in the use of personal computer, various software programs and other office equipment.
Job ID: 523401746
Originally Posted on: 6/2/2026

Want to find more Chemistry opportunities?

Check out the 19,500 verified Chemistry jobs on iHireChemists