Laboratory Technician

Job Summary

The Laboratory Technician I is responsible for supporting in the preparation, and analysis of cementitious materials for conformance to industry specifications. The role requires a good understanding of cement testing procedures and hands-on experience with cement and concrete materials.


CalPortland is proud to offer a comprehensive, competitive benefits package that provides health and financial support to our most important resources: our employees. Your benefits are an important part of your overall compensation at CalPortland. That’s why we give you a wide range of benefits to choose from. 

  • Medical, Dental, Vision 
    • low-cost premiums even for family coverage
  • Company-paid life/AD&D insurance
  • Company-paid short-term disability
  • Paid sick/vacation/holiday
  • 401k/Company Funded Pension Program (program is dependent upon location and job type)
  • Employee Assistance Program (EAP)
  • Additional voluntary benefits 



  • Maintain laboratory safety at its highest standards according to the company’s guidelines and policies
  • Assist laboratory personnel with duties that pertain to sampling, preparing, and collecting materials that are necessary for the testing of cementitious materials
  • Assist with sample preparations and standard quality tests as related to physical analysis of cementitious materials by following the standard procedures (Safety procedures, ASTM, AASHTO, ACI, EPA, etc.) with a high degree of accuracy and precision
  • Assist with concrete trial batches (i.e., Preparing, weighing material, and housekeeping)
  • Assist with the collection and gradation of aggregate for the laboratory
  • Inform and advise the laboratory manager upon observation of suspicious test results and change in equipment and laboratory conditions
  • Maintain lab housekeeping, and inventory supplies to maintain continuity of quality control/quality assurance testing
  • Support laboratory manager and staff with tasks in other areas within the central lab as needed  
  • The job duties described herein are not exhaustive and may be supplemented as necessary


  • High school diploma/GED
  • Degree in Chemistry, Geology, Material Science or Engineering, Chemistry, or a related field preferred 
  • Minimum 1-2 years of relevant experience


  • Hands-on experience with testing of cement and concrete materials
  • Strong communication and teamwork skills 
  • Detail-oriented
  • Must be well-versed in the basics of Microsoft Office Suite (i.e., Outlook, Word, Excel, SharePoint)
  • Must be able to work cooperatively with others
  • Strong problem-solving skills
  • Safety first mentality
  • Physical requirements: sitting, standing, stooping, and bending for long periods of time (up to 8 hrs. Frequent lifting of up to 50 pounds)
  • ANSI-approved PPE will be provided and must be used when required

Conditions of Employment

Successful candidate must submit to a post-offer pre-employment physical examination, drug/alcohol screen, and background check. Some positions require FMCSA-regulated ongoing drug and alcohol testing.


Jurupa Valley, CA, US, 91752

Job Req ID:  12070
Job Type:  Salaried

Nearest Major Market: Riverside
Nearest Secondary Market: Los Angeles

Job Segment: Laboratory, Lab Technician, QA Tester, Materials Science, QA, Science, Healthcare, Quality