Materials Testing Technician Senior

maricopa; Phoenix (AZ); On-site; USD 33,000 - 55,000; Full time

Benefits offered by this job

Tuition reimbursement

Exceptional work-life balance

Growth opportunities

Low-cost healthcare

Child care benefits

Paid vacation

Wellness program

Arizona State Retirement System

Job summary

Maricopa County Department of Transportation (MCDOT) is seeking a Materials Testing Technician Senior. The role focuses on comprehensive QA testing of soils, aggregates, asphalt, and concrete in a lab setting, with field support as needed.

You will coordinate daily work and mentor lab staff to ensure high-quality, efficient operations. The position emphasizes safety, reliability of public infrastructure, and hands-on experience with advanced testing technologies.

Qualifications

• Two years of progressively responsible experience in construction materials testing, public works materials inspection, or related engineering technician duties.
• Associate's degree or two years of college coursework in Construction Technology, Engineering, Engineering Technology, Materials Science, or related field.
• Must possess certifications for ATTI Soil and Aggregate, ATTI Asphalt, and ACI Strength.

Responsibilities

• Perform laboratory testing of all construction materials utilized in the construction of assigned projects.
• Conduct field sampling and testing to verify the adequacy of construction materials and methods.
• Participate in proficiency sample testing and support on-site certification inspections conducted by national certifying agencies to ensure compliance with applicable standards.
• Complete, analyze, and report results for assigned research/investigation and special testing projects in accordance with established procedures and supervisory direction.
• Prepare, review, and submit testing reports and summaries for accuracy and compliance.

Skills

Materials testing

Quality assurance

Lab operations

Education

Associates degree

Coursework in Construction Tech

Tools

ATTI Soil & Aggregate

ATTI Asphalt

ACI Strength

Job description

Posting Date 09/22/26

Application Deadline 10/06/26

Pay Range $23.75 - $40.25 hourly

Salary offers are based on the candidate's equivalent experience and internal equity with other employees within the same job classification. The position is eligible for overtime compensation for all hours worked over 40 in the designated workweek.

Job Type Unclassified

Department Transportation

About the Position

The Materials Testing Technician Senior performs comprehensive quality-assurance testing of transportation project materials, specializing in soils, aggregates, asphalt, and concrete. The position primarily works in a laboratory setting and supports field operations as needed. This role performs and oversees materials testing, inspections, research, and investigations of construction materials, applying industry-standard methodologies for roadway and bridge construction and maintenance, while ensuring full compliance with applicable standards, specifications, and provisions. As a key member of the team, this position directly supports the safety, quality, and reliability of public infrastructure, making a meaningful and lasting impact on the community we serve. The Materials Testing Technician Senior serves as the primary support to the laboratory supervisor by coordinating and delegating daily work activities and assisting in the training, mentoring, and development of lab technicians to ensure high-quality, efficient, and consistent operations. This role offers hands-on experience with advanced and emerging materials testing and nondestructive evaluation technologies.

About Us

We value your time. The time with your family. The time you spend on the road. And the time you spend making a difference. At the Maricopa County Department of Transportation (MCDOT), we provide connections that improve people's lives. By combining innovative technologies with the vast talent of our employees, we plan for future needs and operate a transportation system with the community in mind. Are you interested in contributing to the community in which you work, live, and play? Then, join our team and help us build connections.

Proud to Offer

• Work with a greater purpose
• Tuition reimbursement
• Exceptional work-life balance
• Opportunities for growth and development within Maricopa County
• Low-cost, high-value healthcare for you and your qualifying dependents
• Child care benefits, including access to the Maricopa County Kids Club , dedicated to serving Maricopa County families
• Paid vacation, sick time, and parental leave
• Extensive wellness program, including an incentive
• Enrollment in the Arizona State Retirement System, a defined retirement benefit requiring an 11.98% per paycheck contribution rate that includes a 100% employer match on Day 1

We Require

• Two years of progressively responsible experience in construction materials testing, public works materials inspection, or related engineering technician duties work involving the testing and evaluation of construction materials
• Associate's degree or two years of college coursework in Construction Technology, Engineering, Engineering Technology, Materials Science, or another related field relevant to construction materials testing
• Must possess certifications for ATTI Soil and Aggregate, ATTI Asphalt, and ACI Strength

Other Requirements

• Successful candidates must currently possess, or have the ability to obtain, a valid Arizona driver's license by the time of hire
• Must possess ATTI Field Certification and Nuclear Gauge and Radiation Safety certification, or have the ability to obtain within six months of hire date
• Must possess ACI Field certification, or have the ability to obtain within twelve months of hire date

We Also Value

• Additional experience in materials testing for transportation or infrastructure projects
• Working knowledge of AASHTO and ASTM standards and testing procedures
• Experience with laboratory equipment calibration, maintenance, and quality control practices
• Experience working in both laboratory and field environments under varying conditions
• Strong organizational, analytical, and problem-solving abilities, with effective communication skills for technical reporting

Job Contributions

• Perform laboratory testing of all construction materials utilized in the construction of assigned projects
• Conduct field sampling and testing to verify the adequacy of construction materials and methods
• Participate in proficiency sample testing and support on-site certification inspections conducted by national certifying agencies to ensure compliance with applicable standards
• Complete, analyze, and report results for assigned research/investigation and special testing projects in accordance with established procedures and supervisory direction
• Prepare, review, and submit testing reports and summaries for accuracy and compliance
• Perform and overs