Site Manager / Fate & Transport Expert (Environmental Engineer 5)

Posting number: 2026-TCP2366-02072

Department: Dept. of Ecology

Division: Toxics Cleanup

Job classification: ENVIRONMENTAL ENGINEER 5

Posting type: Open & Promotional

Categories: Engineering, Environmental Services, Public Health, Investigative, Natural Resources, Hydrogeology, Geology/Hydrology, Sciences, Green-Collar/Environmental

Summary

The Department of Ecology is hiring a Site Manager / Fate & Transport Expert (Environmental Engineer 5) within the Toxics Cleanup Program (TCP).

Location:

• Headquarters Office in Lacey, WA.
• Upon hire, you must live within a commutable distance from the duty station.

Schedule:

• This position is eligible for telework and flexible schedule options.
• A minimum of one day per week is required in the office.
• You may also need to attend occasional in-person meetings and activities outside of your in-office schedule.
• Schedules are dependent upon position needs and are subject to change.

Application Timeline:

• Apply by May 10, 2026.
• This position will remain open until filled. The agency reserves the right to make a hire at any time after application review begins. Applications received after the date above may not be considered.

Examples of duties

As a Site Manager / Fate & Transport Expert, you’ll take on some of Washington’s largest and most complex contaminated sites. You’ll review remedial investigations, feasibility studies, and cleanup action plans, and you’ll guide corrective actions and compliance monitoring that support property development, real estate transactions, and other critical activities across the state.

This role offers the chance to apply deep technical expertise where it truly matters. Your knowledge of chemical fate and transport will directly shape cleanup strategies under the Model Toxics Control Act (MTCA), ensuring sound, defensible decisions. You’ll design engineering analyses that evaluate contaminant movement through groundwater, soil, and air, and you’ll help identify the most effective cleanup technologies—from in-situ stabilization to soil vapor extraction to permeable reactive barriers.
You’ll also serve as a technical resource for engineers and site managers, offering clear, thoughtful review and mentorship. And by delivering timely, accurate updates on site status, you’ll help keep real estate transactions, loans, and development moving efficiently while maintaining strong environmental protection standards.

Additional duties as a Site Manager will include:

• Manage and oversee the investigation and cleanup of contaminated sites for compliance with regulations.
• Provide assistance and mentoring to other engineers and site managers.
• Negotiate, issue, and enforce Agreed Orders, Consent Decrees, Department Enforcement Orders and Inter-Agency Agreements.
• Review engineering studies and reports on hazardous waste sites to determine relevant and appropriate state-of-the-art field and design practices and compliance with applicable regulations. 
• Coordinate the planning, implementation and completion of site-specific projects with remediation technologies.
• Prepare engineering reports; assist project team members in their analysis and understanding of design plans and specifications.
• Evaluate the completeness and accuracy of engineering characterization, remedial investigation, and feasibly studies of contaminated sites.
• Review Remedial Investigation Reports, Site Health and Safety Plans, Engineering and Design Reports, post-cleanup as-built drawings, and soil and groundwater lab reports including quality assurance /quality control (QA/QC) documentation.
• Apply Model Toxics Control Act requirements to contaminated sediment sites cleanups and in alignment with Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) requirements.
• Provide in-field oversight of contract en