Materials Testing Technician Senior

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

Benefits offered by this job

Tuition reimbursement

Exceptional work-life balance

Opportunities for growth and dev.

High-value healthcare

Paid vacation, sick time, and parental

Arizona State Retirement System

Job summary

Maricopa County's Department of Transportation seeks a Materials Testing Technician Senior to perform QA testing of soils, aggregates, asphalt, and concrete in lab and field settings. You will coordinate daily lab activities and assist in training technicians to ensure high-quality operations.

The role emphasizes safety, accuracy, and adherence to standards, offering opportunities to work with advanced materials testing and nondestructive evaluation technologies.

Qualifications

• Two years of progressively responsible experience in construction materials testing
• Associate's degree or two years of college coursework in Construction Technology, Engineering, Engineering Technology, Materials Science, or another related field
• Certifications: ATTI Soil and Aggregate, ATTI Asphalt, and ACI Strength
• Arizona driver's license by hire, or ability to obtain
• ATTI Field, Nuclear Gauge and Radiation Safety, within 6 months
• ACI Field within 12 months
• Experience with laboratory and field testing; knowledge of ASTM/AASHTO standards
• Strong organizational, analytical, and problem-solving abilities

Responsibilities

• Perform laboratory testing of construction materials used on assigned projects
• Conduct field sampling and testing to verify material adequacy
• Support on-site certification inspections by national certifying agencies
• Prepare, review, and submit testing reports and summaries for accuracy
• Maintain, calibrate, and verify laboratory testing equipment
• Assist in training and mentoring Laboratory Technicians
• Coordinate and assign daily work activities to support lab operations
• Perform other duties as assigned

Skills

Analytical skills

Problem-solving

Communication skills

Laboratory testing

Education

Associate's degree or 2 years college coursework in Construction Technology/Engineering/Materials Science

ATTI Soil and Aggregate Certification

ATTI Asphalt Certification

ACI Strength Certification

ATTI Field Certification

Nuclear Gauge Certification

ACI Field Certification

Tools

Microsoft Office

Workday

LabQMS (R18)

Temperature-logging software

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 hand-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.

Benefits

• 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

Requirements

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.

Additional Desired Experience

• 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 oversee maintenance, calibration, and verification of laboratory testing equipment.
• Assist in training, mentoring, and guiding Laboratory Technicians to ensure quality and consistency in testing procedures.
• Coordinate and assign daily work activities to support laboratory operations, acting on behalf of the laboratory supervisor as needed.
• Perform other duties as assigned.

Working Conditions

This position requires the employee to be in the office/field or customer-facing for all hours worked. Exerting 50 - 100 pounds occasionally, 10 - 25 pounds frequently, or up to 10 - 20 pounds constantly. The work will occur in an office and field environment. While performing the duties and responsibilities, the employee may be exposed to loud noise, noxious odors, unsanitary conditions, chemicals, electricity, moving mechanical parts, varying weather conditions, and other related conditions and situations. Position is subject to atmospheric conditions: fumes, odors, dust, mists, gases, or poor ventilation.

Machines, Tools, Equipment, Software, and Hardware

Light truck, coring rig, and laboratory testing equipment for soils, aggregates, asphalt, and concrete; heating and burn-off ovens; and standard hand tools such as pliers, screwdrivers, cutting tools, and diamond saws. Software includes Microsoft Office, Workday, temperature-logging applications, Asphalt Institute R18 LabQMS, and software for operating and controlling testing equipment. Hardware includes computers and monitors. Light trucks; coring rigs; laboratory and field-testing equipment for soils, aggregates, asphalt, and concrete; heating and burn-off ovens; standard hand and power tools, including pliers, screwdrivers, cutting tools, and diamond saws; and advanced and emerging materials testing and nondestructive evaluation (NDE) technologies. Software includes Microsoft Office, Workday, temperature-logging applications, Asphalt Institute R18 LabQMS, and specialized software for operating, controlling, and processing data from testing equipment. Hardware includes computers, monitors, data acquisition devices, and associated computer peripherals.

Protective Equipment Required

All MCDOT employees are required to wear Personal Protective Equipment (PPE) if visiting or working in the field. PPE will be issued by MCDOT once employed.

Selection Procedure

Consideration will only be given to candidates who submit online applications. Candidates will be contacted primarily through email and their Workday online application profile. Must pass a pre-employment background and/or fingerprint investigation as required by statute or policy, including drug and alcohol testing requirements for positions designated as safety-sensitive.

Equal Opportunity

Maricopa County is an equal-opportunity employer and is committed to providing equal employment opportunities to all applicants. If you require a reasonable accommodation during the application process or to perform the essential functions of the position under the Americans with Disabilities Act (ADA), please contact [e-mail] to initiate the interactive process.

Employer Information

We are Maricopa County. Forbes has rated Maricopa County one of Arizona’s Best Employers in 2024. We are over 13,000 employees strong, providing vital services for one of the fastest-growing counties in the nation, with over four million residents who call Maricopa County home. We offer a dynamic group of diverse and talented professionals who are passionate about making a difference and giving back to their communities. We offer career paths and opportunities in just about every job category and job level imaginable, so your journey with us is what you make of it! Along with offering purposeful careers, you can expect a rich selection of economical and comprehensive healthcare options, robust retirement plans, tuition and loan payment programs, and multiple paid leave options, as part of an overall generous compensation and benefits package.

Thinking about career options, then please think about us! We are Maricopa County, and we are looking forward to working with you!