Principal Consulting Toxicologist

J.S. Held is seeking a Principal Toxicologist to play a leadership role within our Health Sciences practice, supporting complex litigation, regulatory, and advisory engagements. This position is designed for a senior consulting professional who brings deep technical expertise, expert witness experience, and a strong seller–doer mindset, including the ability to contribute to revenue growth through established client relationships.

The successful candidate will lead high-impact matters involving human health risk, chemical exposure, product safety, and environmental/occupational toxicology, while helping to expand J.S. Held’s global toxicology capabilities.

Job Responsibilities

Leadership & Team Management

• Lead, mentor, and develop a team of toxicologists across multiple projects and geographies
• Ensure scientific rigor, quality assurance, and defensibility across all deliverables
• Foster a collaborative, high-performance team culture aligned with J.S. Held’s consulting standards
• Provide oversight and guidance on complex, high-profile engagements

Expert Services & Technical Leadership

• Serve as a consulting and testifying expert in litigation, arbitration, and regulatory matters
• Lead and deliver toxicological risk assessments, exposure assessments, and product safety evaluations
• Interpret complex toxicological, epidemiological, and exposure data to generate clear, defensible opinions
• Support mass torts, environmental exposure cases, product liability matters, and occupational health disputes
• Translate scientific findings into clear, persuasive insights for legal counsel, regulators, and corporate stakeholders

Client Development & Revenue Growth (Seller–Doer)

• Originate, grow, and maintain client relationships across legal, corporate, and regulatory sectors
• Contribute to and expand a portable book of business, meeting or exceeding revenue targets
• Lead business development activities, including opportunity identification, scoping, pricing, and proposal development
• Partner with cross-functional experts (e.g., epidemiology, industrial hygiene, environmental science) to deliver integrated solutions

Strategic Initiatives & Practice Building

• Support the growth and expansion of toxicology services across the U.S. and international markets
• Collaborate with multidisciplinary teams to integrate toxicology into broader disputes, investigations, and compliance offerings
• Contribute to thought leadership, including publications, conference presentations, and client briefings
• Represent J.S. Held at industry events, expert forums, and networking opportunities

Required

• PhD in Toxicology, Pharmacology, Environmental Health, or a related discipline
• ~15+ years of professional experience, including significant time in consulting and leadership roles
• Demonstrated experience serving as a testifying expert, including preparation of expert reports and participation in depositions and/or trial testimony
• Deep expertise in toxicological risk assessment, chemical exposure, and human health impact analysis
• Strong understanding of global regulatory frameworks (e.g., REACH, CLP, EPA, OSHA, and related regimes)
• Proven seller–doer track record, including business development, client relationship management, and revenue delivery
• Exceptional communication skills, with the ability to present complex scientific concepts to legal, technical, and executive audiences

Preferred

• Experience supporting U.S. and/or international litigation (e.g., mass torts, class actions, regulatory disputes)
• Established professional reputation, including publications, expert testimony history, conference participation, or professional society leadership
• Demonstrated success in launching or expanding service offerings within consulting environments
• Experience working within multidisciplinary expert teams in a professional services or advisory setting

Some of the Benefits We Have Include

J.S. Held understands all our employees are people and sometimes life needs flexibility. We work to always provide an environment that best supports and suits our team’s needs.

• Our flexible work environment allows employees to work remotely, when needed
• Flexible Time Off Policy
• Medical, Dental, and Vision Insurance
• 401k Match
• Commuter Benefits

A reasonable estimate of the base salary range for this role is $150,000 - $300,000. Any offered salary range is based on a wide array of factors including but not limited to skillset, experience, training, location, scope of role, management responsibility, etc.

In addition to base salary, J.S. Held offers a variety of annual bonus programs. Eligibility and details for these bonus schemes will be discussed during the interview process.

Other Duties
Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties, or responsibilities required of the employee for this job. Duties, responsibilities, and activities may change at any time with or without notice.

By submitting your application, you acknowledge that you have read the J.S. Held Online Privacy Notice and hereby freely and unambiguously give informed consent to the collection, processing, use, and storage of your personal information as required and described therein. California residents can click here to learn more about the personal information we collect and here to learn about additional privacy rights that may be available.

Please explore what we’re all about at www.jsheld.com.

EEO and Job Accommodations
We embrace diversity and our commitment to building a team and environment that fosters professional and personal enrichment is unwavering. We are greater when we are equal! J.S. Held is an equal opportunity employer that is committed to hiring a diverse workforce. All qualified applicants will receive consideration for employment without regard to sex, gender identity, sexual orientation, race, color, religion, national origin,
disability, protected Veteran status, age, or any other characteristic protected by law. If you are an individual with a disability and would like to request for a reasonable accommodation, please email jobs@jsheld.com and include “Applicant Accommodation” within the subject line with your request and contact information.

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