Principal Toxicologist (Ph.D.)

About Exponent

Exponent is the only premium engineering and scientific consulting firm with the depth and breadth of expertise to solve our clients’ most profoundly unique, unprecedented, and urgent challenges. We are committed to engaging multidisciplinary teams of science, engineering, and regulatory experts to empower our clients with solutions that create a safer, healthier, and more sustainable world.

Our Opportunity

We are currently seeking a Principal Toxicologist for our Health Sciences Practice. This position is open to all U.S. office locations. In this role, you will work as part of a team to provide high-level leadership and collaboration on projects related to litigation support, toxicological evaluations, risk assessment, and risk communication involving a wide range of products and chemicals. This includes evaluating health hazards, mechanisms of action, dose-response, exposure levels, and conducting comparative risk research, utilizing data science tools, assisting with regulatory documents and analyses, and conducting risk assessments under various regulatory and legal paradigms.

Responsibilities

• Lead projects, identify new clients, expand relationships with existing clients, develop technical staff, and develop new business in related Health Sciences areas, particularly in the areas of product stewardship, toxic tort, and emerging chemicals of concern.
• Contribute to the firm’s thought leadership and client impact by leveraging deep knowledge in toxicology to address a wide range of complex human health challenges across diverse client sectors, delivering scientifically rigorous and impactful solutions.
• Identify, pursue, and secure new client engagements by understanding emerging needs and building long-term partnerships.
• Maintain and grow trusted relationships with existing clients by consistently delivering high-quality work, anticipating future needs, and serving as a strategic advisor.
• Build, manage, and empower multidisciplinary teams, fostering a collaborative and inclusive environment that values diverse perspectives and scientific integrity.
• Provide guidance, coaching, and professional development opportunities to technical staff, supporting their growth into future leaders and experts.
• Ensure successful project execution through effective planning, resource allocation, and budget management, while maintaining high standards of quality and timeliness.
• Offer high-level scientific and strategic advice to both internal stakeholders and external clients.
• Enhance the firm’s visibility and credibility by publishing in peer-reviewed journals, presenting at industry conferences, leading seminars, and participating in expert advisory or technical committees.

Qualifications

• PhD in Toxicology or a related scientific field
• Minimum of 8 years of consulting experience in the toxicology space
• Proven track record of business generation and attracting new and repeat clients or funding
• Diplomate of the American Board of Toxicology (DABT)
• Exceptional verbal and written communication skills, with the ability to articulate complex ideas clearly and persuasively to diverse audiences
• Strong analytical and problem-solving skills, with the ability to interpret data, identify trends, and make informed recommendations in your scientific field
• Outstanding reputation among clients and the scientific community for integrity, responsiveness, and technical expertise
• Adept people management abilities coupled with extensive experience in successfully overseeing and executing complex projects
• Strong commitment to professional development

Benefits

• Access benefits information on our Life @ Exponent page: https://www.exponent.com/careers/life-exponent
• Equal opportunity employer
• Email HR-Accommodations@exponent.com for assistance or accommodation due to a disability