Senior Remediation Subject Matter Expert (SME)

Senior Remediation Subject Matter Expert (SME) Part-time State/Province: California Business Group: DCS Legal Entity: AECOM Technical Services Inc Business Line: Environment Work Location Model: Remote Operating Group: Americas Primary Location: US - Oakland, CA - 300 Lakeside Driv Compensation: USD 60 - USD 85 - hourly Company Description Work with Us. Change the World. 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.

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