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Aggregate Quality Control Jobs in California (NOW HIRING)

Colas

QC Technician 1

Irwindale, CA · On-site

$26/hr

QC Technician 1 Company: SULLY-MILLER Job Location: IRWINDALE, CALIFORNIA, USA Type of Contract ... United Rock provides the aggregate, Blue Diamond Materials provides the hot and warm mix asphalt ...

Colas

QC Technician 1

Irwindale, CA · On-site

$26/hr

United Rock provides the aggregate, Blue Diamond Materials provides the hot and warm mix asphalt ... Compensation $26 per hour Job Summary The Quality Control Technician I is responsible for sampling ...

Colas

QC Technician 1

Irwindale, CA · On-site

$26/hr

United Rock provides the aggregate, Blue Diamond Materials provides the hot and warm mix asphalt ... Compensation $26 per hour Job Summary The Quality Control Technician I is responsible for sampling ...

CRH

QC Technician

Tracy, CA · On-site

$30 - $35/hr

QC Technician Architectural Products Group Tracy, California, United States Job ID: 526729 ... Ensure mixer and aggregate bin probes are calibrated and properly maintained * Calculate ...

CRH

QC Technician

Tracy, CA · On-site

$30 - $35/hr

Ensure mixer and aggregate bin probes are calibrated and properly maintained * Calculate ... quality checks as well as higher level QC/QA testing * Execute Daily Plant and Business ...

Holliday Rock

Aggregate Plant Manager

Upland, CA · On-site

$110K - $120K/yr

The Plan Manager Aggregate is responsible for executing the daily production plan. Works with the ... QC reporting, gradations, and how to adjust plant configuration to meet specifications. • ...

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All JobsAggregate Quality Control JobsAggregate Quality Control Jobs in California

Aggregate Quality Control information

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How much do aggregate quality control jobs pay per hour?

As of Aug 9, 2026, the average hourly pay for aggregate quality control in California is $20.69, according to ZipRecruiter salary data. Most workers in this role earn between $17.79 and $22.79 per hour, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as an aggregate quality control professional, and why are they important?

To excel as an Aggregate Quality Control professional, a strong background in geology, materials science, and quality assurance principles is essential, often supported by a relevant degree or certification such as ACI or NICET. Familiarity with laboratory testing equipment, data analysis software, and industry standards like ASTM or AASHTO is typically required. Attention to detail, effective communication, and problem-solving abilities set outstanding candidates apart. These skills ensure compliance with regulations, consistent material quality, and the safety and success of construction projects.

What is aggregate quality control?

Aggregate Quality Control refers to the process of monitoring and testing construction aggregates—such as sand, gravel, and crushed stone—to ensure they meet required standards for use in building projects. This role involves sampling materials, running laboratory tests, and documenting results to verify compliance with specifications. Aggregate Quality Control professionals help maintain the safety, durability, and performance of construction materials, preventing project delays and structural issues. They also work closely with production teams and regulatory agencies to address any quality concerns.

What are some common challenges faced by aggregate quality control professionals, and how can they be addressed?

Aggregate Quality Control professionals often encounter challenges such as maintaining consistency in material quality, adhering to strict testing standards, and managing timely communication with production teams. Variations in raw materials and environmental conditions can impact test results, requiring careful monitoring and adjustment. To address these challenges, professionals should stay updated on industry standards, collaborate closely with laboratory and production staff, and implement regular training and calibration of testing equipment to ensure accuracy.

What is the difference between Aggregate Quality Control vs Quality Control Inspector?

AspectAggregate Quality ControlQuality Control Inspector
CertificationsQuality certifications, industry-specific standardsQuality certifications, industry standards
Work EnvironmentConstruction sites, manufacturing plants, material testing labsManufacturing facilities, construction sites, production lines
Employer & Industry UsageConstruction, civil engineering, materials testingManufacturing, production, construction
Primary FocusMonitoring and testing aggregate materials for quality complianceInspecting finished products or materials for defects and standards

Aggregate Quality Control professionals focus on testing and monitoring aggregate materials used in construction to ensure they meet quality standards. Quality Control Inspectors typically examine finished products or materials during manufacturing to identify defects. While both roles involve quality assurance, Aggregate Quality Control emphasizes material testing and compliance in construction and materials industries, whereas Quality Control Inspectors focus on inspecting products during or after production.

What are popular job titles related to Aggregate Quality Control jobs in California? For Aggregate Quality Control jobs in California, the most frequently searched job titles are:
What job categories do people searching Aggregate Quality Control jobs in California look for? The top searched job categories for Aggregate Quality Control jobs in California are:
What cities in California are hiring for Aggregate Quality Control jobs? Cities in California with the most Aggregate Quality Control job openings:
Aggregate Quality Control jobs near you
Infographic showing various Aggregate Quality Control job openings in California as of August 2026, with employment types broken down into 1% As Needed, 80% Full Time, 14% Part Time, 4% Contract, and 1% Nights. Highlights an 90% Physical, 1% Hybrid, and 9% Remote job distribution, with an average salary of $43,041 per year, or $20.7 per hour.

QC Technician 1

Colas

Irwindale, CA • On-site

$26/hr

Full-time

Re-posted yesterday

Job description

QC Technician 1
Company: SULLY-MILLER
Job Location: IRWINDALE, CALIFORNIA, USA
Type of Contract: Regular
Posting Start Date: 6/8/26
Blue Diamond Materials is one of the companies that operates within Sully-Miller Contracting Co., the Colas USA subsidiary that operates throughout Southern California. We are part of Sully-Miller Companies consisting of Sully-Miller Contracting Co., Blue Diamond Materials and United Rock Products. Each company supports the other. United Rock provides the aggregate, Blue Diamond Materials provides the hot and warm mix asphalt manufacturing, and Sully-Miller Contracting executes the projects. Blue Diamond has five asphalt plants located throughout Southern California- Irwindale, Inglewood, South Gate, Sun Valley and Victorville. To learn more about Blue Diamond visit www.bluediamondasphalt.com.
The Colas USA Family of Companies provides competitive pay, outstanding benefits, career advancement opportunities, professional education, and extensive training for every employee. We pride ourselves on upholding the highest standards of safety, environmental conservation, and ethical conduct as we strive to grow our infrastructure products and services through empowering and developing our people, fostering innovation, utilizing new technology, and maximizing vertical integration at all levels of the company's value chain. To learn more about the Colas USA Family of Companies, please visit www.colasusa.com.
Job Description:
Compensation
$26 per hour
Job Summary
The Quality Control Technician I is responsible for sampling, testing, and reporting on construction materials-including but not limited to hot mix asphalt, aggregates, soils, and concrete-to ensure compliance with project specifications and industry standards.
Main Responsibilities
  • Perform precise testing and inspection of construction materials to guarantee quality and compliance
  • Accurately measure, document, and report test results in a timely manner
  • Develop proficiency in sampling, testing, and calculating values for asphalt, aggregates, and other materials
  • Identify product quality issues, troubleshoot problems, and implement corrective actions
  • Analyze test results to determine causes of nonconformities and recommend solutions
  • Gain competence in AASHTO, ASTM, and Caltrans test methods
  • Familiarize yourself with Green Book, FAA, Caltrans Standard Specifications, and other applicable regulations
  • Be flexible and available for overtime, including nights and weekends, as needed
  • Perform additional duties as assigned

Education and/or Work Experience Requirements:
Valid CA Driver's License with an excellent driving record
Skills
  • Ability to be precise and accurate when taking measurements and completing test forms
  • Ability to follow direction with excellent follow through within a timely manner
  • Ability to learn specific QC computer programs
  • Ability to lift 50 lbs. during various times of the day
  • Dependable self-starter with good organization skills
  • Organizational and problem-solving skills
  • Verbal and written communication skills
  • Legible handwriting
  • Proficient in all Microsoft Office Products
  • Proficient math skills

Physical Requirements
  • Ability to utilize hands and fingers in order to type and carry reports
  • Ability to stand, walk, and reach with arms and hands throughout the workday
  • Ability to climb, balance, stoop, kneel, and crouch
  • Ability to see clearly or with assistance via necessary correction
  • Wearing and maintaining personal protective equipment (PPE) required
  • Frequently exposed to all weather conditions
  • Frequent exposure to working around moving equipment and machinery
  • Frequent exposure to dust, airborne particles, etc.

Colas Inc. and its subsidiaries are an Equal Opportunity Employer. For details on the specifics of this commitment, please click here to view the EEO document. If you are an individual with a disability and require a reasonable accommodation to:
  • to meet the requirements of the role in which you are applying
  • complete any part of the application process
  • access or use the online application process and need an alternative method for applying

Please contact Colas Inc. at 973-290-9082 or send an email to ColasRecruiter@colasinc.com.
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