Quality Control Technician

Knight's Companies Inc.; Charleston (SC); On-site; USD 36,000 - 52,000; Full time

Job summary

Knight's Companies Inc. seeks a Quality Control Technician to test concrete and aggregates at plant sites and on job locations, ensuring products meet specifications. You will support production, document results, and coordinate with teams to uphold quality and safety standards.

The role requires knowledge of testing methods, interpretation of specs, and the ability to work independently with minimum supervision.

Qualifications

• High school diploma required; Associate's degree preferred.
• ACI Concrete Field Tech Level I certification required.
• Minimum 1 year experience in quality control.
• Ability to read and interpret construction specs and concrete mix designs.

Responsibilities

• Perform quality control testing on concrete and aggregates (slump, air content, unit weight, compressive strength).
• Monitor production and delivery to ensure consistent product quality.
• Coordinate with plant/dispatch teams for quality adjustments.
• Conduct trial batches and evaluate mix designs ahead of project needs.
• Oversee and collaborate with third-party testing services.
• Maintain accurate testing records and documentation.

Skills

QA testing

Concrete knowledge

Documentation

Education

High School Diploma

Associate's degree

Tools

Microsoft Office

Job description

Join our team as aQuality Control Technician, where you’ll play a key role in ensuring the quality and consistency of our ready-mix concrete products. In this position, you’ll work both at plant sites and job locations, performing critical testing and supporting production to meet customer specifications and industry standards.

What You’ll Do:

• Perform quality control testing on concrete and aggregates, including slump, air content, unit weight, and compressive strength
• Monitor production and delivery performance to ensure consistent product quality
• Coordinate with plant and dispatch teams to implement necessary quality adjustments
• Conduct trial batches and evaluate mix designs ahead of project needs
• Oversee and collaborate with third-party testing services
• Maintain accurate testing records and documentation
• Ensure compliance with NRMCA Plant Certification requirements
• Maintain lab equipment and work areas to industry standards
• Uphold all safety and environmental policies
• Deliver professional, customer-focused service at all times

What You Need to Be Successful:

• High school diploma required; Associate's degree preferred.
• Working computer knowledge; including applicable Microsoft software.
• Current, valid state driver’s license.
• Excellent communication and organizational skills.
• ACI Concrete Field Tech Level I certification required.
• Minimum of 1 year experience in a quality control.
• Ability to understand, interpret, and use construction specifications and concrete mix designs.
• General knowledge of the properties, characteristics, and performance of concrete mixes, its components, additives, and raw materials.
• Ability to work independently with minimal supervision.
• Ability to accurately understand, analyze, and interpret information.
• Proficiency in reading, understanding, speaking, writing, and using the English language.
• Ability to accurately perform basic mathematical functions including adding, subtracting, multiplication, division, percentage computations and basic area and volume computations using fractions, decimal equivalents or whole numbers, and basic area, volume, unit weight, and total weight computations.
• Ability to work as part of a team.
• Ability to accept and follow direction as provided by managers, and ask questions when needed.
• Ability to work overtime as needed.