SUPERVISOR QUALITY CONTROL AGGREGATES

CEMEX, Inc.; Rialto (CA); Hybrid; USD 77,000 - 97,000; Full time

Job summary

Cemex US in Rialto, CA is seeking a Supervisor Quality Control Aggregates to lead a QC team, perform sampling and testing of aggregate products, and ensure compliance with specifications.

Under the direction of the Quality Control Manager, you will manage lab calibration, record keeping, internal audits, and safety compliance while collaborating with Operations to maintain in-spec product.

Qualifications

• High School Diploma or equivalent.
• Ability to read and understand English.
• Basic mathematical skills.
• Ability to obtain ACI Certification within 6 months (Aggregate Testing Technician).
• Ability to lift up to 50 pounds and work in a plant environment.

Responsibilities

• Obtains samples from raw, in-process and finished materials.
• Update and maintain the Quality Control Program.
• Verify that lab equipment is calibrated regularly and maintain calibration records.
• Compile, store and maintain quality records, and produce reports as needed.
• Verify that materials are available to produce final product; discuss discrepancies with supplier.
• Arrange internal quality audits.
• Communicate with Operations Management to keep them informed on process corrections.
• Comply with safety rules and wear protective equipment on site.
• Perform other tasks as assigned by Manager.

Skills

English communication

Lab equipment operation

Quality control oversight

Sampling and testing

Education

High School Diploma or equivalent

Tools

Laboratory equipment

Job description

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Job title: SUPERVISOR QUALITY CONTROL AGGREGATES

Date: Sep 16, 2026

Location: RIALTO, CA, US, 92376

Company Overview

Cemex US is a leader in the building materials industry, known for our innovation, quality, and operational excellence. With over a century of expertise, we are committed to delivering products and services that meet the needs of our customers and communities across the globe. At Cemex, we believe in investing in our people, offering competitive benefits and the opportunity to be part of a dynamic team. Join us and build your career with a company that is Building a Better Future.

Job Summary

Under the direction of the Quality Control Manager, the QC Supervisor must be able to perform sampling and testing of aggregate products as directed. Reports deviations from standards immediately to manager. The Aggregates Quality Control Supervisor is primarily responsible for managing a team and verifying that the product produced in the plant meets quality standards necessary to conform to specifications. The QC supervisor must perform the work activities in a correct, accurate, and timely fashion due to the fact every single work activity in our line of business is crucial for the whole operation.

Job Responsibilities

• Obtains samples from raw, in-process and finished materials.
• Update and maintain the Quality Control Program.
• Verify that lab equipment is calibrated regularly, and maintain calibration records.
• Compile, store and maintain quality records, and produce reports as needed.
• Verify that materials are available to produce final product. Discuss discrepancies with supplier and rectify, if necessary.
• Arrange internal quality audits.
• Interact with all management levels ensuring that Operations Management is fully apprised on process corrections necessary to produce in spec product.
• Must comply with company safety rules and regulations and wear proper safety equipment while on plant grounds. Safety equipment means clothing and apparatus including, but not limited to hardhat, safety glasses, ear protection, safety shoes, back support belts, gloves and respirators.
• Perform other tasks as assigned by Manager

Qualifications

• High School Diploma or equivalent

Knowledge, Skills, and Abilities

• Ability to carry out simple oral and written instructions and deal with simple problems from standardized situations.
• Basic mathematical skills, algebra, and common units of measurements.
• Ability to read and understand English sufficiently to be able to read basic technical information, reports, and to recognize differences between words, including safety issues and related matters.
• Ability to communicate well in English with lead man, supervisor, and co-workers.
• Lifting, carrying, pushing, pulling and/or moving 75 pounds maximum, with frequent lifting and/or carrying objects weighing up to 50 pounds, and up to 20 pounds of force constantly to move objects.
• Ability to detect safety hazards and equipment malfunctions and respond accordingly.
• Ability to operate laboratory equipment.
• Ability to comprehend additional training presented to him/her in relation to the performance of the work duties.
• High level of attentiveness and physical coordination to perform the work activities safely and productively.
• Ability to obtain ACI Certification within 6 months of employment (Aggregate Testing Technician)

Working Conditions

• Continuous exposure to extreme heat, extreme cold, extreme noise, and working outdoors
• Must wear protective equipment while on the job

Physical Requirements

• Long periods of standing and/or walking required
• Some exposure to dust, noise, and extreme temperatures
• Ability to lift up to 50 pounds occasionally
• While performing the duties of this job, the employee is regularly required to talk and hear, in order to communicate to employees/visitors as well as function safely around heavy rolling equipment
• Must be able to perform all job functions which include, but may not be limited to, pushing, turning, and/or pulling of controls

Legal Notices

CEMEX is an EEO/AA (equal opportunity/affirmative action) institution and does not discriminate on the basis of race, color, religion, religious creed, sex, sexual orientation, gender identity or expression, national origin, ancestry, age, physical or mental disability, medical condition, genetic information, marital or familial status, military or veteran status, or any other characteristic protected by under federal, state or local law in the programs or activities which it operates.

CEMEX will consider for employment qualified applicants with criminal histories in a manner consistent with all local, state and federal laws.

CEMEX is an E-Verify participating employer.

Arizona Smoke-Free Act. CEMEX complies with the State of Arizona’s Smoke-Free Act (Arizona Revised Statutes § 36-601.01). Smoking and/or the use of tobacco or related products is prohibited in and on CEMEX property as well as any building and/or vehicle owned or leased by CEMEX.

CEMEX offers both competitive pay and benefits. Benefits applicable to this position may include, but are not limited to, medical, dental, vision, 401(k), Paid Time Off, and Holiday Pay, as well as a comprehensive wellness program to help keep employees and their families healthy and well. You can learn more about CEMEX Benefits by visiting the CEMEX USA Benefits and Well-Being page. (https://www.cemexusa.com/careers/life-at-cemex/benefits-well-being).

The expected base compensation for this position ranges from $76600.00 to $97300.00 depending on, but not limited to, market location, job-related knowledge, skill sets, experience, and education