Principal Toxicology Scientist & Health Sciences Leader

Exponent; Washington (District of Columbia); On-site; USD 200,000 - 300,000; Full time

Job summary

Exponent is seeking a Principal Scientist (Toxicology) to lead and shape high-impact toxicology projects in the Health Sciences Practice, based in Washington, DC. You will guide litigation support, risk assessments, and regulatory analyses for diverse products and chemicals.

As a seasoned leader, you will mentor staff, grow client engagements, and drive thought leadership through scientific outputs and seminars, while ensuring quality and timely delivery.

Qualifications

• PhD in Toxicology or related scientific field.
• Minimum 10 years in consulting or leadership in toxicology.
• DABT certification and client engagement experience.
• Experience with PFAS or emerging chemicals is a plus.
• Strong communication and leadership across teams.

Responsibilities

• Lead projects and scale multidisciplinary teams with integrity.
• Identify and secure new client engagements and partnerships.
• Mentor staff and develop leaders within Health Sciences.
• Oversee project planning, budgets, and timely delivery.
• Provide strategic toxicology and regulatory guidance on chemicals.

Skills

Toxicology leadership

Business development

Regulatory strategy

Data interpretation

Team leadership

Education

PhD in Toxicology

DABT certification

Job description

Exponent is seeking a Principal Scientist (Toxicology) to lead and shape high-impact toxicology projects in the Health Sciences Practice, based in Washington, DC. You will guide litigation support, risk assessments, and regulatory analyses for diverse products and chemicals.

As a seasoned leader, you will mentor staff, grow client engagements, and drive thought leadership through scientific outputs and seminars, while ensuring quality and timely delivery.