QC Technician

Subsidiary: Sully Miller Holding Co.


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.  

Throughout Colas USA, we provide 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

Blue Diamond, and the rest of the Colas USA Family of Companies, is part of the Colas Group, the worldwide leader in transportation infrastructure construction and maintenance. For information on our international network visit www.colas.com

Job Summary


The QC Tech II is responsible for testing and inspection of all hot mix asphalt, aggregates and other construction materials produced and delivered to internal and external customers as well as performing limited specialized laboratory testing and HMA performance testing.

Main Responsibilities


  • Works under minimal supervision
  • Ensures precision and accuracy when taking measurements and completing test forms
  • Ensure test results are reported daily and on time to supervisor
  • Inspect products for quality, identify issues and take corrective actions as necessary
  • Review and analyze test results to determine causes of nonconformity with product specifications as required.
  • Must be familiar with ASSHTO, ASTM, and Caltrans test methods
  • Must be knowledgeable with “Green Book”, FAA, Caltrans Standard Specifications and other local applicable specifications which includes sampling, testing, and material specifications
  • Must be available to work overtime as required which may include weekends and nights
  • Other duties as assigned



  • Minimum 3 years of related work experience preferred
  • Some college education preferred



  • Current or past Caltrans certifications in HMA and aggregates (JTCP HMA I and Aggregate Module preferred)
  • Experience with HMA performance tests such as Hveem, Marshall, Gyratory compaction, Tensile Strength Ratios and Hamburg Wheel.
  • Experience with aggregate property testing such as LA Rattler and fine & coarse specific gravity
  • Experience with limited soils testing such as standard and modified proctors
  • 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


Colas Inc. and its subsidiaries (Blue Diamond Materials) are an Equal Opportunity Employer. For details on the specifics of this commitment, please click here to view the EEO document. If you need an accommodation to access the information provided on this website, please contact Colas Inc. 973-290-9082 or send an email to ColasRecruiter@colasinc.com.

Nearest Major Market: Los Angeles