Mix Design Specialist

Martin Marietta is looking for a Mix Design Specialist to join their Quality Control team. The Mix Design Specialist is responsible for developing, testing, and optimizing asphalt mix designs to meet MnDOT specifications and project requirements. This role ensures consistent plant production quality through oversight of materials, processes, and compliance with state and federal standards. The position plays a critical role in ensuring asphalt mixtures meet performance, durability, and safety criteria. This is a union position and membership in the IUOE Local 49 is required.

Key Responsibilities
Mix Design & Quality Control

Develop, evaluate, and maintain asphalt mix designs in accordance with MnDOT specifications.

Perform laboratory testing including aggregate gradation, asphalt content analysis, volumetric properties, and performance tests.

Adjust mix designs and plant settings to optimize product quality, cost efficiency, and performance.

Maintain documentation and records of mix designs, test results, and compliance reports.

Plant Production Support

Monitor plant production processes to ensure adherence to approved mix designs.

Collaborate with plant operators to troubleshoot production issues and ensure consistent product quality.

Observe stockpile management and ensure materials meet required specifications.

Regulatory Compliance

Ensure all mix designs and production practices comply with MnDOT, ASTM, and AASHTO standards.

Coordinate with MnDOT representatives and inspectors during plant audits and project approvals.

Continuous Improvement

Recommend improvements in materials, processes, and testing procedures.

Stay informed of industry trends, new technologies, and evolving MnDOT requirements.

Participate in quality improvement initiatives and internal audits.

Required Qualifications
Education & Experience

High School diploma or equivalent.

Bachelor’s degree in civil engineering, Construction Management, Materials Science, or related field OR equivalent industry experience.

Minimum of 3–5 years of experience in asphalt mix design, plant operations, or materials testing.

Valid US drivers license

Certifications (MnDOT Required)

Must possess or be able to obtain the following MnDOT certifications:

APTC – Aggregate Production Technician Certification

BPTC – Bituminous Plant Technician Certification

BMDC – Bituminous Mix Design Certification

BSIC – Bituminous Street Inspector Certification

Technical Skills

Strong understanding of asphalt materials, aggregate properties, and mix design methodologies (Superpave, Marshall, etc.)

Knowledge of MnDOT specifications and QA/QC procedures

Proficiency with laboratory testing equipment and data analysis tools

Familiarity with plant control systems and production processes

Preferred Qualifications

Experience working directly with MnDOT projects or similar DOT agencies

Background in field inspection or construction quality assurance

Key Competencies

Analytical thinking and attention to detail

Problem-solving and root cause analysis

Strong communication and collaboration skills

Ability to manage multiple projects and deadlines

Commitment to safety and compliance

Working Conditions

Combination of laboratory, office, and outdoor plant environment

Exposure to high temperatures, dust, and heavy equipment

Occasional travel to production and project sites as needed

Physical Demands
While performing the duties of this job, the employee is occasionally required to stand; walk; sit; use hands to handle, or feel objects, tools, or controls; reach with hands and arms; climb stairs; balance; stoop, kneel, crouch or crawl; and talk or hear. The employee must occasionally lift or move up to 50 pounds. Specific vision abilities required by the job include close vision, distance vision, peripheral vision, depth perception and the ability to adjust focus.

Other Duties
Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties, or responsibilities that are required of the employee for this job. Duties, responsibilities, and activities may change at any time with or without notice.

This is a safety-sensitive role and Martin Marietta will continue to require drug testing that does include testing for cannabis/THC.

We are excited to share the base salary rate for this position is $47.66. Conditions and terms of employment and benefits are in accordance with the collective bargaining agreement for the International Union of Operating Engineers (IUOE) Local 49.

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