Field & Lab Aggregate Technician (Caltrans QC)

Ecology Auto Parts Inc; California (MO); On-site; USD 34,000 - 52,000; Full time

Benefits offered by this job

Medical Insurance

Dental Insurance

Vision Insurance

401k with matching

Paid Time Off

Job summary

Aggregate Mineral Resource Group, LLC. is seeking an Aggregate Technician to support sampling, testing, and quality control across quarry and processing facilities.

You will conduct Caltrans-compliant laboratory and field tests, document results, and help assure material quality for construction projects. The role requires Caltrans certifications, hands-on testing experience, and the ability to work in active industrial environments.

Qualifications

• Current Caltrans aggregate testing certifications required.
• Minimum 2–5 years of experience in aggregate testing, quality control, construction materials, or quarry operations preferred.
• Strong understanding of aggregate production processes, material specifications, and testing procedures.
• Knowledge of Caltrans standards, laboratory testing protocols, and quality assurance requirements.
• Experience performing laboratory and field testing for aggregate and construction materials.
• Familiarity with crushing plants, screening systems, quarry operations, and material processing environments preferred.
• Strong attention to detail and ability to maintain accurate documentation and testing records.
• Ability to analyze material data and communicate findings effectively to operations personnel and leadership.
• Strong organizational, communication, and problem-solving skills.
• Proficiency with Microsoft Office and basic reporting systems preferred.
• Ability to work independently and manage multiple testing priorities in a fast-paced environment.
• Valid driver’s license and reliable transportation required.

Responsibilities

• Perform aggregate sampling, testing, and quality control procedures in accordance with Caltrans and industry standards.
• Conduct laboratory and field testing of aggregate materials including gradation, moisture content, density, sand equivalent, and other required material tests.
• Collect and document representative material samples from quarry, crushing, screening, and stockpile operations.
• Maintain accurate testing records, quality assurance documentation, and compliance reporting.
• Ensure aggregate products meet Caltrans specifications, project requirements, and customer quality standards.
• Collaborate with operations personnel and plant operators to identify and address material quality issues.
• Monitor material production trends and communicate quality concerns to operations leadership.
• Maintain testing equipment, laboratory instruments, and sampling tools in proper working condition.
• Assist with internal audits, quality inspections, and compliance reviews as required.
• Coordinate with external inspectors, contractors, vendors, and regulatory personnel during material evaluations and site visits.
• Support operational improvement initiatives related to aggregate quality, production consistency, and material performance.
• Follow all company safety procedures, MSHA regulations, and environmental compliance standards.
• Assist with inventory management of laboratory supplies, testing materials, and operational consumables.
• Participate in safety meetings, operational training, and ongoing quality assurance initiatives.
• Travel between operational sites as necessary to support testing and inspection activities.

Skills

Caltrans certification

Attention to detail

Analytical thinking

Communication

Independent work

Driver’s license

Tools

Microsoft Office

Job description

Aggregate Mineral Resource Group, LLC. is seeking an Aggregate Technician to support sampling, testing, and quality control across quarry and processing facilities.

You will conduct Caltrans-compliant laboratory and field tests, document results, and help assure material quality for construction projects. The role requires Caltrans certifications, hands-on testing experience, and the ability to work in active industrial environments.