AECOM is seeking an experienced Environmental Technician IV to join our Remediation team in Billings, Montana.JOB SUMMARY:This position will support environmental remediation and vapor intrusion mitigation projects, initially focusing on a federal program involving occupied residential properties throughout Montana.The successful candidate will serve as a senior field resource, leading and performing environmental sampling, vapor intrusion mitigation system inspections, installation support, maintenance, troubleshooting, and repairs. The ideal candidate will have strong environmental field experience, mechanical aptitude, and the ability to independently manage field assignments while coordinating with project managers, engineers, subcontractors, clients, and residents.This role requires sound technical judgment, a strong commitment to safety and quality, and the ability to identify field issues, resolve routine problems, and communicate conditions requiring additional technical review. Work will primarily occur in Billings, with periodic travel throughout Montana and surrounding states.JOB RESPONSIBILITIES:Lead and perform environmental sampling activities, including indoor and outdoor air, subslab soil vapor, and crawlspace sampling.Perform vapor intrusion mitigation system inspections, installation support, startup, operations and maintenance (O&M), troubleshooting, and repairs.Independently execute routine and complex field assignments, identify field conditions, resolve routine issues, and recommend next steps.Conduct pressure measurements, equipment readings, and system performance evaluations.Provide hands-on support for piping, fans, electrical components, sealing, and related mechanical systems within applicable training and authorization.Coordinate with project managers, engineers, subcontractors, licensed trade contractors, and field personnel.Assist with planning field mobilizations, equipment, materials, sampling supplies, and site access.Perform groundwater sampling and gauging, including low-flow, no-purge, and conventional methods, as needed.Maintain accurate field records, including daily reports, sampling logs, photographs, inspection records, equipment readings, and electronic documentation.Communicate professionally with residents, property owners, clients, and site representatives while protecting property and privacy.Identify and report field deficiencies, safety concerns, equipment issues, and deviations from approved procedures.Maintain field equipment, tools, supplies, and assigned vehicles.Support project health and safety plans, quality procedures, and applicable regulatory requirements.Provide technical guidance and field support to less experienced technicians, as assigned.Travel periodically to project locations throughout Montana and surrounding states.