Materials Inspector Series (ABET) - St. Louis District

State-of-Missour; Chesterfield (MO); On-site; USD 60,000 - 80,000; Full time

Job summary

Missouri Department of Transportation (MoDOT) seeks a materials inspector for the St. Louis District Office in Chesterfield, MO. The role tests construction materials and ensures compliance with specs, with opportunities across entry to senior levels under a CAREER-LADDER framework.

Responsibilities include sampling, testing, coordinating bituminous mixes, and potential inspections at plants. Requires engineering degree, OSHA 10, and possible nuclear gauges certification.

Qualifications

• ABET-accredited engineering degree required.
• Nuclear gauges certification may be required.
• OSHA 10-Hour Certification required within 90 days.
• Successful completion of work simulation and medical-physical examinations.

Responsibilities

• Sample and test general construction materials to ensure specifications.
• Sample and test aggregate production for quality/compliance at quarries.
• Prepare samples for bituminous mixes and coordinate with contractors.
• Possibly act as inspector in charge at plants producing bituminous mixtures.
• Inspect prestressed or precast concrete and test materials for federal projects.

Skills

ABET-accredited engineering degree

Nuclear gauges certification

OSHA 10-Hour Certification

Education

ABET-accredited engineering degree

Nuclear gauges certification

OSHA 10-Hour Certification

Job description

Posting closes 11/06/2026

Note for internal applicants: Successful candidates already at rates above the posted salary will be evaluated on an individual basis to determine final salary outcome.

Job Location: Materials Department - St. Louis District Office - 1590 Woodlake Drive, Chesterfield, MO 63017

Why You'll love this Position

The materials inspector samples and tests general construction and maintenance materials to ensure that materials and products used in state highway construction and maintenance activities comply with specifications. Responsibilities are performed under moderate supervision.
MoDOT will bring candidates onto the team as entry-level, intermediate or senior level, based on your skills and experience. This opening is for one of our CAREER-LADDER positions which offers the opportunity for career advancement without having to participate in the competitive selection interview process. As you continue to learn, acquire new skills, and gain experience, you can be promoted to a higher-level position.

What You'll Do

• Samples and tests general construction materials such as steel, pipe, paint, asphalt, and cement to determine if materials conform to specifications and approves/rejects material for intended use.
• Samples and tests fine and course aggregate production for quality and gradation specification compliance at quarries supplying materials for department projects and approves/rejects material.
• Prepares samples for bituminous trial mixes; coordinates with contractor on trial mix information.
• May perform duties of inspector in charge at plants producing bituminous mixtures to determine if the material produced conforms to specifications and approves or rejects the material.
• May perform inspections of prestressed or precast concrete and special sampling and testing of materials required on federal aid projects.

Minimum Qualifications

• Bachelor's degree in engineering from an ABET-accredited college or university curriculum.
• Certification to operate nuclear gauges may be required.
• OSHA 10-Hour Certification required within 90 days.
• Successful completion of a work simulation examination and a medical-physical examination.

Special Working Conditions:

• Job requires moderate physical activity.
• Job requires exposure to physical hazards, health and safety risks, and/or adverse or otherwise undesirable characteristics in the environment.
• Job may require operation of vehicles to plow snow and spread ice control materials.
• A postsecondary degree is the best measure to ensure candidates possess required engineering knowledge, including in applied physics and mathematics, drafting, engineering processes and procedures, project management, industry ethical standards, and analyzing and modeling data.

More reasons to love this position:

MoDOT offers an excellent benefits package that includes a defined pension plan, generous amounts of leave and holiday time, and eligibility for health insurance coverage. Visit our CAREERS page to explore all we have to offer. Your total compensation is more than the dollars you receive in your paycheck. To help demonstrate the value of working for MoDOT, we have created an interactive Total Compensation Calculator. This tool provides a comprehensive view of benefits and more that are offered to prospective employees. The Total Compensation Calculator and other applicant resources can be found HERE.

At MoDOT you will play a key role in maintaining the seventh largest highway system in the United States. We value team players who are open-minded and work well with others to accomplish goals and fulfill our mission of safety, service, and stability. We see the growth of our team members as an investment, both in MoDOT's future and yours. If you're looking for diverse opportunities, challenging work, and a flexible environment, we want to talk to you about joining our winning team. MoDOT operates on shared values and your success in our organization depends upon modeling these values. If you embrace these values, we welcome your application.

If you have questions about this position, please contact: [e-mail]

The State of Missouri is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.