Aggregate Technician; Amrg, Llc.

Aggregate Technician

Aggregate Mineral Resource Group, LLC. is seeking a knowledgeable and detail-oriented Aggregate Technician to support aggregate production, sampling, testing, and quality control operations across active quarry and material processing facilities. This position is responsible for conducting aggregate sampling and laboratory testing procedures, ensuring material compliance with Caltrans specifications, maintaining accurate testing documentation, and supporting operational quality assurance initiatives.

The Aggregate Technician will work closely with quarry operations personnel, plant operators, quality control teams, and management to ensure aggregate materials consistently meet required specifications for construction, infrastructure, and roadway applications. This role requires strong technical knowledge of aggregate testing procedures, attention to detail, and the ability to work effectively within active industrial and quarry environments.

The ideal candidate will possess current Caltrans certifications, aggregate testing experience, and a strong understanding of construction materials, laboratory procedures, and field sampling operations.

Responsibilities include performing aggregate sampling, testing, and quality control procedures in accordance with Caltrans and industry standards; conducting laboratory and field testing of aggregate materials including gradation, moisture content, density, sand equivalent, and other required material tests; collecting and documenting representative material samples from quarry, crushing, screening, and stockpile operations; maintaining accurate testing records, quality assurance documentation, and compliance reporting; ensuring aggregate products meet Caltrans specifications, project requirements, and customer quality standards;

collaborating with operations personnel and plant operators to identify and address material quality issues; monitoring material production trends and communicating quality concerns to operations leadership; maintaining testing equipment, laboratory instruments, and sampling tools in proper working condition; assisting with internal audits, quality inspections, and compliance reviews as required; coordinating with external inspectors, contractors, vendors, and regulatory personnel during material evaluations and site visits;

supporting operational improvement initiatives related to aggregate quality, production consistency, and material performance; following all company safety procedures, MSHA regulations, and environmental compliance standards; assisting with inventory management of laboratory supplies, testing materials, and operational consumables; participating in safety meetings, operational training, and ongoing quality assurance initiatives; and traveling between operational sites as necessary to support testing and inspection activities.

Qualifications/Knowledge/Critical Skills include 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; and valid driver's license and reliable transportation required.

Physical Demands/Environmental Factors include regular exposure to outdoor industrial quarry, aggregate processing, and…