Quality Control Tech -- Lewiston/Clarkston

Knife River Corporation; Clarkston (WA); On-site; USD 45,000 - 65,000; Full time

Job summary

Knife River Idaho Division is seeking a Quality Control Technician to join our Lewiston/Clarkston area team. The role focuses on materials sampling, testing, and documentation across concrete materials and related QC procedures, with potential travel and extended hours as needed.

Qualified candidates typically have 2+ years in aggregate/concrete testing, plus certifications such as ACI-Field Grade 1 and WAQTC aggregate. We value safety, reliability, and readiness to support field operations.

Qualifications

• Minimum 2 years’ experience with aggregate/concrete materials and knowledge of testing procedures.

Responsibilities

• Responsibilities include materials sampling and testing documentation/logging and various quality control procedures.

Skills

Materials sampling

Testing procedures

Tools

ACI-Field Grade 1

WAQTC aggregate certification

NRMCA

Job description

Quality Control Tech -- Lewiston/Clarkston

Job Category: Quality Control

Requisition Number: QUALI003120

• Posted : February 12, 2026
• Full-Time

Locations

Showing 1 location

Lewiston Construction - Knife River

Description

At Knife River, we take care of our team because we know it’s our people who make us successful. We are one of the 10 largest construction materials producers/contractors in the Country, and we are a PEOPLE-first company. Our team members are the key to our success, and we are committed to giving them the tools, training, and time to do their jobs productively and safely each day. Our goal is to build strong teams that, in turn, build strong communities. We are also a publicly traded company on the NYSE with the ticker symbol KNF and part of the S&P MidCap 400 index.

Knife River Idaho Division is looking for a Quality Control Technician to join our team in the Lewiston, Idaho area.

Major Job Responsibilities will include:

Responsibilities will include materials sampling and testing documentation/logging and various quality control procedures.

This position requires the availability to work up to 7 days per week as well as varied and extended hours. You may be required to travel out of town for short periods of time.

PLEASE NO PHONE CALLS ABOUT THIS POSITION. EMAILS AND RESUMES WILL NOT BE REVIEWED OR ACCEPTED IN LIEU OF THE REQUIRED APPLICATION.

Women, veterans and minorities are encouraged to apply.

Minimum Qualifications:

Preferred Qualifications: Preferred candidates will have a minimum of 2 years’ experience with aggregate/concrete materials and have knowledge of the testing procedures. Preferred candidates will also have current/previous ACI-Field Grade 1 certifications and the Idaho WAQTC aggregate certification. Other material testing qualifications/certifications including but not limited to WAQTC, ACI, NRMCA, etc.

Knife River is an Equal Opportunity/Affirmative Action employer. All qualified applicants will receive consideration for employment without regard to race, age, color, religion, gender, gender identity, sexual orientation, national origin, disability, protected Veteran status or any other protected category under applicable state/federal law. Subject to pre-employment drug testing and background checks.

At Knife River, we are committed to helping our military transition to civilian life. We are constantly looking to add veterans to our workforce and want to make the transition as smooth as possible. There are many jobs within the military that are transferable to our Quality Control Tech posting:

Army:

• Petroleum Laboratory Specialist

Equal Opportunity Employer/Protected Veterans/Individuals with Disabilities. This employer is required to notify all applicants of their rights pursuant to federal employment laws. For further information, please review the Know Your Rights notice from the Department of Labor.