Senior Remediation Subject Matter Expert (SME)

Company Description

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At AECOM, we're delivering a better world. Whether improving your commute, keeping the lights on, providing access to clean water, or transforming skylines, our work helps people and communities thrive. We are the world's trusted infrastructure consulting firm, partnering with clients to solve the world’s most complex challenges and build legacies for future generations.

There has never been a better time to be at AECOM. With accelerating infrastructure investment worldwide, our services are in great demand. We invite you to bring your bold ideas and big dreams and become part of a global team of over 50,000 planners, designers, engineers, scientists, digital innovators, program and construction managers and other professionals delivering projects that create a positive and tangible impact around the world.

We're one global team driven by our common purpose to deliver a better world. Join us.

Job Description

AECOM is seeking a highly experienced Senior Remediation Subject Matter Expert (SME) to provide technical leadership and strategic guidance for complex environmental remediation projects supporting clients in the oil & gas, refining, petrochemical, energy, and industrial sectors. This is a part-time position designed for a recognized industry expert who will serve as a senior technical resource across multiple projects, supporting project delivery, mentoring technical staff, and helping clients develop innovative, cost-effective remediation solutions.

The successful candidate will possess extensive experience with contaminated site investigation and remediation, regulatory compliance, remedial design, and closure strategies. This individual will collaborate with multidisciplinary teams while serving as a trusted advisor to clients and project managers.

The responsibilities of this position include, but are not limited to:

• Serve as the senior technical lead and subject matter expert for environmental remediation projects involving soil, groundwater, sediment, and vapor impacts.
• Provide technical oversight and quality reviews for remedial investigations, feasibility studies, corrective action plans, remedial designs, risk assessments, remedial action implementation, and site closure documentation.
• Develop and review conceptual site models (CSMs), evaluate contaminant fate and transport, and recommend practical, technically sound remediation strategies.
• Provide technical expertise in the evaluation, selection, and optimization of remediation technologies, including:
• • In-situ Chemical Oxidation (ISCO)
  • Soil Vapor Extraction (SVE)
  • Air Sparging
  • Multi-Phase Extraction (MPE)
  • Bioremediation
  • Pump and Treat Systems
  • Monitored Natural Attenuation (MNA)
  • Engineered containment systems
• Provide strategic guidance for projects regulated under RCRA Corrective Action, CERCLA/Superfund, Brownfields, UST/LUST, and state voluntary cleanup programs.
• Serve as a senior technical advisor during client meetings, regulatory discussions, and project planning activities.
• Mentor and provide technical leadership to project managers, engineers, geologists, hydrogeologists, and environmental scientists.
• Support business development efforts by contributing to technical proposals, scope development, project planning, and client presentations.
• Collaborate with multidisciplinary engineering and environmental teams to deliver innovative, practical, and cost-effective solutions.
• Perform senior-level technical reviews to ensure quality, consistency, regulatory compliance, and adherence to AECOM quality standards.
• Apply strong analytical, problem-solving, communication, and technical writing skills while managing multiple priorities and supporting diverse project teams.
• Demonstrated experience managing and providing technical oversight for complex remediation projects supporting oil & gas, refinery, petrochemical, industrial, manufacturing, or energy clients.
• Extensive knowledge of federal and state environmental regulations, including RCRA, CERCLA, UST/LUST programs, and Risk-Based Corrective Action (RBCA).
• Demonstrated expertise in contaminated site investigation, remedial design, remedy optimization, and regulatory closure.
• Excellent technical writing, report review, presentation, and client communication skills.
• Proven ability to mentor technical staff and provide leadership across multidisciplinary project teams.

Qualifications

Minimum Requirements

• Bachelor's degree in Environmental Engineering, Civil Engineering, Geological Engineering, Geology, Hydrogeology, Environmental Science, or a related field.
• 10+ years of experience or demonstrated equivalency of experience and/or education.

Preferred Qualifications

• 20+ years of progressively responsible environmental consulting experience with significant remediation expertise.
• Professional Engineer (PE) and/or Professional Geologist (PG) registration.
• Master's degree in Engineering, Hydrogeology, Environmental Science, Geology, or a related discipline.
• Experience supporting refinery, terminal, pipeline, and upstream or downstream oil & gas remediation projects.
• Experience with groundwater modeling, contaminant transport modeling, and remedial system optimization.
• Recognized technical expert with an established reputation within the environmental consulting industry.
• Strong client relationship management and business development experience, including proposal preparation and strategic client support.

Additional Information

This position does not provide employment visa sponsorship now or in the future. Candidates must be authorized to work in the United States without the need for current or future sponsorship.

Employment is contingent upon successfully passing a pre-employment drug screen.

At AECOM, we are committed to maintaining a secure and trustworthy recruitment process and take any fraudulent hiring activity seriously. To support this commitment, all newly hired employees are required to attend an in-person Day 1 onboarding at an AECOM office location as a condition of employment.

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 aecom.com. 

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, you’ll 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 you’ve always envisioned. Here, you’ll 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.