Aggregate Technician - Field & Lab Quality Control

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

Job summary

Aggregate Mineral Resource Group, LLC. is seeking a knowledgeable Aggregate Technician to support sampling, laboratory testing, and quality control across active quarry and processing sites. This role ensures materials meet Caltrans specifications through rigorous testing and accurate documentation.

The technician collaborates with quarry operations, QC teams, and management, requiring Caltrans certifications and experience in field and lab testing. Travel between sites is possible.

Qualifications

• Caltrans aggregate testing certifications required.
• 2–5 years of aggregate testing, quality control or quarry experience preferred.
• Strong knowledge of aggregate production processes and material specs.
• Knowledge of Caltrans standards, lab testing protocols, and QA requirements.
• Experience performing lab and field testing for aggregates.
• Familiarity with crushing plants, screening, quarry operations, and processing environments.
• Strong attention to detail and ability to maintain accurate documentation.
• Ability to analyze material data and communicate findings to operations and leadership.
• Strong organizational, communication, and problem-solving skills.
• Proficiency with Microsoft Office and basic reporting systems.
• Ability to work independently and manage multiple testing priorities.
• Valid driver’s license and reliable transportation.

Responsibilities

• Perform aggregate sampling, testing, and quality control procedures per Caltrans and industry standards.
• Conduct laboratory and field testing including gradation, moisture content, density, and sand equivalent.
• Collect and document representative material samples from quarry, crushing, screening, and stockpile operations.
• Maintain accurate testing records, QA 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 certifications

Experience in aggregate testing

Material specifications

Caltrans standards

Laboratory & field testing

Crushing plants familiarity

Documentation

Data analysis

Organizational skills

MS Office

Independent work

Driver's license

Job description

Aggregate Mineral Resource Group, LLC. is seeking a knowledgeable Aggregate Technician to support sampling, laboratory testing, and quality control across active quarry and processing sites. This role ensures materials meet Caltrans specifications through rigorous testing and accurate documentation.

The technician collaborates with quarry operations, QC teams, and management, requiring Caltrans certifications and experience in field and lab testing. Travel between sites is possible.