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. This is a union position and membership in the IUOE Local 49 is required.

• 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.
• 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.

• 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.
• 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.

• High School diploma or equivalent.
• Bachelor’s degree in civil engineering, Construction Management, Materials Science, or related field OR equivalent industry experience.
• Minimum 3–5 years of experience in asphalt mix design, plant operations, or materials testing.
• Valid U.S. driver’s license.

• 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

• 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.

• Experience working directly with MnDOT projects or similar DOT agencies.
• Background in field inspection or construction quality assurance.
• 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.

• 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.

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.

• Medical
• Prescription Drug
• Vision
• Dependent Care Reimbursement Account
• Wellness Programs Employee Assistance Plan
• Paid Holidays and Vacation
• 401(k) with Company matching
• Pension
• Salary Continuation – Short-Term Disability
• Long-Term Disability Options
• Employee Life Insurance
• Business Travel Accident Insurance
• Direct Deposit Payroll
• Educational/Tuition Assistance Plan
• Matching Gift Program
• New Auto Purchase Discount Plans

Base salary rate for this position is $47.66 per hour, in accordance with the collective bargaining agreement for the International Union of Operating Engineers (IUOE) Local 49.

At Martin Marietta, we are proud to be an Equal Opportunity Employer. We are committed to providing an environment of mutual respect where equal employment opportunities are available to all qualified applicants and teammates. We celebrate diversity and commit that qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability.