Senior Material Specialist, Tunnel Practice

AECOM is seeking a Senior Material and Durability Specialist to join our Tunnel Practice in Markham Ontario. This candidate will lead durability design and materials engineering for civil infrastructure from design through construction and commissioning. This is a new position.

Responsibilities:

• Develop and validate durability criteria service-life models and exposure classifications; select materials and protective systems (concrete/shotcrete mix designs SCMs steel protection grout waterproofing sealants coatings) aligned with CSA (e.g. A23.1/A23.2 S6) and relevant ACI/ASTM/EN standards; and review submittals supplier qualifications mix trials and mockups.
• Plan and interpret laboratory and field testing (e.g. RCPT/bulk resistivity chloride diffusion carbonation ASR mitigation sulphate resistance freezethaw petrography pulloff adhesion permeability/leakage rebar corrosion/halfcell) and translate results into clear recommendations acceptance decisions and corrective actions.
• Provide construction-phase support by responding to RFIs and site clarifications troubleshooting material nonconformances optimizing curing and placement practices and verifying conformity through ITPs batch plant oversight production monitoring and asbuilt traceability.
• Contribute to risk and change management by documenting durability assumptions tracking deviations advising on lifecycle/maintenance implications and preparing concise technical reports for clients and contractors.

Qualifications :

Minimum Requirements:

• BS 6 years of relevant experience or demonstrated equivalency of experience and/or education.

Preferred qualifications:

• Masters degree in civil engineering with minimum 6 years of demonstrated experience across Canada and overseas to lead durability design and materials engineering for civil infrastructure from design through construction and commissioning highly preferred.
• Strong communication coordination and digital documentation skills are essential along with fluency in Canadian codes and international practices gained on overseas assignments.
• Experience bridging design intent to site execution coaching field teams and working flexibly in plant lab and active construction environments is highly valued.

Additional Information :

About AECOM 

AECOM is proud to offer comprehensive benefits to meet the diverse needs of our employees. Depending on your employment status AECOM benefits may include medical dental vision life AD&D disability benefits paid time off leaves of absences voluntary benefits perks flexible work options well-being resources employee assistance program business travel insurance service recognition awards retirement savings plan and employee stock purchase plan. 

AECOM is the global infrastructure leader committed to delivering a better world. As a trusted professional services firm powered by deep technical abilities we solve our clients complex challenges in water environment energy transportation and buildings. Our teams partner with public- and private-sector clients to create innovative sustainable and resilient solutions throughout the project lifecycle from advisory planning design and engineering to program and construction management. AECOM is a Fortune 500 firm that had revenue of $16.1 billion in fiscal year 2025. Learn more at . 

What makes AECOM a great place to work 

You will be part of a global team that champions your growth and career ambitions. Work on groundbreaking projects - both in your local community and on a global scale - that are transforming our industry and shaping the future. With cutting-edge technology and a network of experts youll have the resources to make a real impact. Our award-winning training and development programs are designed to expand your technical expertise and leadership skills helping you build the career youve always envisioned. Here youll find a welcoming workplace built on respect collaboration and community - where you have the freedom to grow in a world of opportunity. 

As an Equal Opportunity Employer we believe in your potential and are here to help you achieve it. All your information will be kept confidential according to EEO guidelines. Artificial intelligence will be used to support the screening assessment and selection of applicants for this role. Final hiring decisions are made by the hiring team.

Remote Work :

No

Employment Type :

Full-time