Quality Control Technician III

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.

Compensation

$38 per hour

Job Summary

The Quality Control Technician 3 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. In addition, this role requires experience in performing specialized laboratory testing to assess material properties and ensure quality assurance. The technician will apply advanced knowledge and technical skills to support accuracy, reliability, and continuous improvement in construction material evaluation.

Main Responsibilities

• Work mostly independently
• May serve as a senior technician, occasionally overseeing other technicians on high-priority projects
• Ensure precision and accuracy in measurements, test forms, and daily reporting
• Conduct thorough inspections, identify quality issues, and implement corrective actions
• Analyze test results to diagnose causes of nonconformities and recommend solutions
• Apply expert knowledge of AASHTO, ASTM, and Caltrans test methods
• Maintain familiarity with Green Book, FAA, Caltrans Standard Specifications, and other applicable specifications
• Perform specialized testing on hot mix asphalt, aggregates, and soils, including performance tests like Hveem, Marshall, Gyratory compaction, Tensile Strength Ratios, and Hamburg Wheel
• Perform aggregate property assessments, including LA Rattler and fine & coarse specific gravity tests
• Perform soils testing, such as standard and modified proctors and R-values
• Develop, analyze, and optimize HMA mix designs per project specifications
• Maintain flexibility for overtime, including nights and weekends, as required
• Perform other duties as assigned

Education and / or Work Experience Requirements

Skills

Physical Requirements

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 :

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

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