Principal Consulting Toxicologist

J.S. Held LLC•Redmond, WA

1d•$150,000 - $300,000•Remote

About The Position

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.

Requirements

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

Nice To Haves

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

Responsibilities

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
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
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
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