Senior Environmental Project Scientist — Lead Investigations

Weston Solutions; West Chester (Chester County); On-site; USD 88,000 - 144,000; Full time

Benefits offered by this job

Medical benefits

Dental benefits

Vision benefits

401K with employer stock contributions

Paid time off

Job summary

Weston Solutions, Inc. is hiring a Senior Project Scientist in West Chester, PA to lead environmental investigations, remediation programs, and emergency response activities, guiding technical decisions and delivering high-quality client outcomes.

The role requires 10–15 years of experience, strong leadership, and the ability to manage field operations, teams, schedules, and budgets while ensuring safety and regulatory compliance.

Qualifications

• Bachelor’s or Master’s degree in Environmental Science, Geoscience, Engineering, Physical Science, Life Science, or a related field.
• 10 to 15 years of relevant experience in environmental investigations, remediation, emergency response operations, or a combination of these areas.
• Demonstrated experience leading complex environmental site investigations or remediation projects involving potentially hazardous substances.
• Ability to serve as a technical resource, guide complex technical decisions, solve problems, and manage multiple priorities.
• Experience managing field operations, subcontractors, multidisciplinary teams, project scope, schedules, budgets, resources, risks, and technical deliverables.
• Experience developing and reviewing technical reports, investigation documents, work plans, field sampling plans, health and safety plans, technical procedures, and quality assurance documentation.
• Strong ability to analyze, interpret, organize, and communicate analytical data, monitoring results, and field observations.
• Strong leadership, mentoring, client-facing, written, and verbal communication skills.
• Experience using field sampling equipment, air and water monitoring instruments, PPE, and related field tools.
• Valid driver’s license and authorization to work in the United States.

Responsibilities

• Lead complex environmental investigations, remediation programs, emergency response activities, and related field and office assignments from planning through completion.
• Manage project execution in accordance with scope, budget, schedule, technical requirements, regulatory standards, Weston procedures, and client expectations.
• Plan and oversee field investigations and sampling programs at active construction, remediation, and potentially hazardous sites.
• Direct field staff, subcontractors, and multidisciplinary teams while coordinating resources and reinforcing safe, efficient work practices.
• Analyze field observations, analytical data, and monitoring results to develop defensible conclusions, recommendations, and project strategies.
• Prepare and review scientific reports, investigation summaries, removal action documentation, technical memoranda, work plans, sampling plans, health and safety plans, quality assurance documents, schedules, budgets, and other deliverables.
• Conduct peer reviews of project scopes, technical documents, calculations, data interpretations, and deliverables to support quality and consistency.
• Identify project risks, constraints, and opportunities, and implement corrective actions when needed.
• Communicate project objectives, progress, needs, concerns, and deliverable expectations to clients, stakeholders, Project Managers, subcontractors, technical teams, and leadership.
• Maintain accurate and auditable field documentation, correspondence, notebooks, technical files, and project records.
• Mentor junior staff and provide technical guidance to project teams.
• Evaluate new technologies, tools, and techniques for potential use in project execution and Weston service offerings.

Skills

Leadership

Mentoring

Client communication

Written communication

Verbal communication

Field operations management

Data interpretation

Education

Bachelor’s or Master’s degree in Environmental Science/Geoscience/Engineering/Physical/Life Science

Tools

Microsoft Office

Field sampling equipment

Job description

Weston Solutions, Inc. is hiring a Senior Project Scientist in West Chester, PA to lead environmental investigations, remediation programs, and emergency response activities, guiding technical decisions and delivering high-quality client outcomes.

The role requires 10–15 years of experience, strong leadership, and the ability to manage field operations, teams, schedules, and budgets while ensuring safety and regulatory compliance.