Environmental Toxicologist - Senior Level (Hybrid)

The role – what you’ll do

Barr is seeking a senior environmental toxicologist to support complex, multidisciplinary projects focused on contaminated sediment, surface water, groundwater, and ecological risk assessment. Assignments may include conducting ecological risk assessments; developing toxicity and exposure evaluations for contaminated sediment projects; interpreting environmental chemistry and toxicology data; preparing technical reports, study design and sampling plans, and quality assurance documentation; and contributing to projects conducted under CERCLA, RCRA, NEPA, NRDA, and other federal and state environmental programs.

The ideal candidate brings strong analytical judgment, excellent technical writing skills, advanced knowledge of environmental toxicology, and experience working within the regulatory frameworks that guide contaminated site cleanup. They demonstrate leadership, the ability to coordinate multiple priorities, and the interpersonal skills needed to work effectively with colleagues, clients, agencies, and stakeholder groups. Above all, they value teamwork, quality, and integrity in delivering impactful environmental solutions.

Your impact – key responsibilities

• Technical knowledge: apply advanced environmental toxicology principles to evaluate chemical exposure and effects across sediment, water, and biological systems. Interpret chemistry and toxicity data to support ecological risk assessments and help inform remedial decision-making.
• Project leadership: lead or support project and task delivery, including developing scopes, schedules, and budgets, managing teams, and producing high-quality technical documents. Foster strong client relationships and contribute to successful execution of complex environmental projects.
• Problem solving and regulatory strategy: assess site-specific environmental conditions and develop scientifically defensible approaches aligned with CERCLA, RCRA, and other regulatory programs. Provide clear technical and regulatory recommendations that support environmental decisions and cleanup strategies.
• Communication: prepare clear, compliant technical documentation and effectively communicate complex concepts to both technical and non-technical audiences.
• Interpersonal savvy: collaborate with multidisciplinary teams and clients to align technical work with project objectives while fostering strong, productive working relationships. Mentor junior staff, support team development, and contribute positively to Barr’s culture of teamwork, respect, and client service.

About the opportunity

• Hybrid: ahybrid work arrangement may be considered for this position. A hybrid work arrangement refers to splitting time worked between a Barr office and a home office. This position can be based in Barr's Seattle, Washington, or Denver, Colorado, offices.
• Travel expectation: willingness to travel and periodically adjust personal schedule to meet project needs; fieldwork opportunities may be available in this role, depending on project needs, interests, and experience, and may include some out-of-town travel.
• Work environment: ability to work in locations that may feature rough terrain typical of construction sites and may also require entering and working in facilities that include limited accessibility, moving machinery, and other conditions typical of industrial facilities. Job assignments may involve work on waste disposal sites and sites requiring cleanup of hazardous materials. An OSHA-mandated physical exam may be required. Safety training will be provided. Applicants may be asked to participate in a drug screening program at the request of specific clients. Candidates must be able to perform job duties with or without reasonable accommodation.

Physical requirements for the role may include the following for site visits and/or fieldwork:

• Ability to conduct fieldwork in varying outdoor conditions (e.g., heat, cold, rain, uneven terrain).
• Must be able to lift and carry equipment and materials weighing up to 50 pounds.
• Capable of standing, walking, kneeling, or crouching for extended periods.
• Use of personal protective equipment (PPE) as required by site conditions.
• Ability to safely operate or work around environmental monitoring and sampling equipment.
• Candidates must be able to perform job duties with or without reasonable accommodation.

About you – required core competencies

• Education: master’s degree in environmental toxicology, environmental science, chemistry, environmental engineering, ecology, or a related field.
• Experience: minimum of 8 years of relevant experience supporting contaminated site investigations, environmental toxicology evaluations, or ecological risk assessments in consulting, industry, laboratory, or regulatory settings.
• Software: strong computer skills, including proficiency with Microsoft Office Suite and the ability to work effectively with environmental datasets, toxicity results, and technical documentation.
• Regulatory Knowledge: familiarity with CERCLA, RCRA, NRDA, NEPA, ESA, and the Clean Water Act.
• Driver’s license: possession of a current, valid driver’s license and an acceptable driving record.
• Must be legally authorized to work in the United States without the need for sponsorship by Barr, now or in the future.

Helpful additional experience (not required)

• Modeling experience using PHREEQC and Geochemist’s Workbench.
• Experience conducting or interpreting toxicity tests, bioassessments, or ecological field surveys.
• Experience coordinating with regulatory agencies, stakeholder groups, or multiparty PRP teams.
• Experience with business development or client relationship management.
• HAZWOPER 40-hour certification.

Compensation: anticipated range of $95,000–$115,000 annually. Compensation will vary based on relevant experience, education, skill level, and other compensable factors. Employees in this position may also be eligible for a discretionary cash bonus based on team and individual performance. This position is classified as exempt (salaried) under the Fair Labor Standards Act.

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Benefits - what we offer

We are committed to providing an employee experience that attracts and retains top talent. That's why we offer a competitive package of employee benefits - including some unique offerings not found at other companies. At Barr, we also believe that learning doesn't stop when you get your degree, which is why we provide coaching, mentoring, and support for ongoing educational opportunities to foster professional development at every stage of your career.

• Competitive, affordable insurance plans: Medical, dental, vision, life, disability, accidental death insurance, and flexible spending accounts for medical and dependent care

• Retirement benefits: 401(k) retirement savings plan with company contribution and an Employee Stock Ownership Plan (ESOP) with company contribution in Barr stock

• Profit distribution: Barr has a "no retained earnings" model and distributes all profit to our employees through our annual bonus distribution plan, ESOP, and dividends to shareholders

• Professional development benefits: Annual time and expense allowances, mentorship program, and many internal training opportunities

• Work/life balance: Paid time off, holidays, overtime for non-exempt/hourly staff, and compensatory time for exempt/salaried staff (time off or pay for extra time worked), paid family leave

• Wellness focus: Ergonomic analysis and equipment, Personal Protective Equipment allowance, wellbeing-focused educational opportunities

Please note that benefits eligibility is determined and may change based on part-time, reduced-time, or full-time status.

About us - why choose Barr

At Barr, you'll join a community of engineers, scientists, and professionals who will help you achieve your ambitions and build a meaningful, rewarding career. You'll serve as a trusted advisor to clients who value Barr's tailored solutions and commitment to exceptional service.

As part of our employee-owned firm, you'll contribute to a culture of commitment and camaraderie where staff can thrive as professionals. We value diverse perspectives and experiences and believe an inclusive workplace is critical to our success.

To learn more about Barr's culture and values, visit:

Open positions at Barr Engineering Co. do not have application deadlines. Barr Engineering Co. is an equal opportunity employer, and all applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.