Careers

Description:

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. 

Skills/Eligibility:

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.