Precision Materials Lab Technician — Soils & Concrete QC

Construction Material Testing; Sioux City (IA); On-site; USD 34,000 - 48,000; Full time

Job summary

Construction Material Testing in Sioux City, Iowa seeks a Laboratory Technician to convert field samples into ASTM data within a documented AASHTO R18 quality system. You will work with calibrated equipment and maintain accountability for every result that leaves the lab.

Day-to-day duties include processing Proctor curves, sieve analyses, Atterberg limits, moisture contents, and break strength tests, logging data, and supporting proficiency programs and accreditation activities.

Qualifications

• Careful hands, clean documentation habits, mechanical aptitude.
• Prior lab or CMT experience a plus, not required — we train
• Comfortable with repetitive precision work done right every time

Responsibilities

• Perform ASTM D698, D1557, D2216, D4318, C136, and C39 testing
• Maintain calibration, standardization, and quality records
• Log samples and preserve chain of custody
• Break cylinders and report strength results same day
• Support proficiency sample programs and accreditation assessments

Skills

Careful hands

Clean documentation habits

Mechanical aptitude

Tools

Calibrated equipment

Job description

Construction Material Testing in Sioux City, Iowa seeks a Laboratory Technician to convert field samples into ASTM data within a documented AASHTO R18 quality system. You will work with calibrated equipment and maintain accountability for every result that leaves the lab.

Day-to-day duties include processing Proctor curves, sieve analyses, Atterberg limits, moisture contents, and break strength tests, logging data, and supporting proficiency programs and accreditation activities.