Field & Lab Materials Testing Technician

Lone Star Engineering & Testing Laboratory, LLC; San Antonio (TX); On-site; USD 42,000 - 62,000; Full time

Job summary

Lone Star Engineering & Testing Laboratory, LLC is seeking a Construction Materials Testing Technician to join our field and laboratory teams. You will perform a range of tests on concrete, asphalt, soil, and masonry to ensure compliance with industry standards and project specs.

The role emphasizes outdoor work on active construction sites, data collection, and clear communication with project managers, contractors, and clients. You will help maintain safety and quality across site operations.

Qualifications

• Familiar with ASTM and TxDOT standards for concrete, soil, asphalt testing.
• Experience on construction sites in inspection or quality control.
• Understanding of concrete forming, masonry, asphalt paving, and soil prep.
• Proficient in MS Office for reports and data management.
• Strong communication skills for clients and teams.
• Outdoor work experience in various weather conditions.
• Ability to follow safety protocols.

Responsibilities

• Perform field inspections and sampling to verify material compliance.
• Collect and record data on material properties.
• Assist quality control by inspecting forms, reinforcing steel, and testing.
• Communicate findings to project managers, contractors, and clients.
• Maintain documentation of tests, results, and inspection reports.
• Support site activities while following safety protocols.
• Conduct laboratory testing of construction materials.
• Operate company vehicles and equipment safely.

Skills

Field inspections

Data collection

Communication

Safety protocols

Outdoor work

Math calculations

ASTM/TxDOT knowledge

Tools

Microsoft Office

Job description

Lone Star Engineering & Testing Laboratory, LLC is seeking a Construction Materials Testing Technician to join our field and laboratory teams. You will perform a range of tests on concrete, asphalt, soil, and masonry to ensure compliance with industry standards and project specs.

The role emphasizes outdoor work on active construction sites, data collection, and clear communication with project managers, contractors, and clients. You will help maintain safety and quality across site operations.