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Natalia Millan

Natalia Millan brings over a decade of specialized experience in the assessment and management of environmental hazards, including water and mold damage, asbestos, and other contaminants. Her expertise spans the full lifecycle of environmental projects from initial site inspections and sample collection to the interpretation of analytical data and the development of comprehensive reports, operations and maintenance plans, and remediation protocols.

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Neva Jacobs

Dr. Neva Jacobs is a board-certified industrial hygienist with over 15 years of experience in exposure and health risk assessment. Her expertise spans quantitative exposure analysis, industrial hygiene, human health risk evaluation, and corporate history documentation.

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Alex Attenwoode

Alex Attenwoode joined J.S. Held in October of 2025.

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Karen Elsass

Karen Elsass is a board‑certified toxicologist with more than 20 years of experience designing and managing nonclinical studies for commercial, academic, and government clients, including the National Toxicology Program, the National Cancer Institute, and the National Institute of Allergy and Infectious Diseases. Her expertise spans small‑molecule and biologic drug candidates, including vaccines, oncolytic viruses, and cell‑ and gene‑therapies, and she has led numerous studies supporting Investigational New Drug (IND) applications in compliance with FDA Good Laboratory Practices.

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Taeghan Cavanaugh

Taeghan Cavanaugh joined J.S. Held in November of 2025.

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Steve Chu

Steve Chu has over 23 years of experience leading complex ecological and regulatory projects for public and private clients in the energy, transportation, and commercial development sectors. He specializes in securing permits under the Clean Water Act (Sections 404 and 401), Rivers and Harbors Act, Endangered Species Act, and local permitting for utility-scale renewable energy, oil and gas, transportation, and commercial projects.

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Scott Beckman

Dr. Scott Beckman specializes in litigation support as both a testifying and consulting expert. He has extensive experience preparing expert reports, rebuttals, and settlement memorandums for mediation, allocation, regulatory oversight, and litigation involving Superfund mega-sites, Department of Defense and Department of Energy programs, insurance claims, and international disputes.

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Brenda Rojas

Brenda Rojas joined J.S. Held in January of 2026.

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Colby Navarre

Colby Navarre, a Registered Nurse (RN), has over 10 years of experience in intensive and medical-surgical care, cardiac surgery, neurology, infectious disease, orthopedics, nephrology, wound care, oncology, skilled and field nursing, and occupational health. He also has a background in industrial workforce safety and in chain-of-custody oversight for sample collection.

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Iain Brunning

With over 30 years of leadership experience across retail, manufacturing, product development, and global regulatory strategy, Iain Brunning is an internationally recognized expert in cosmetic and consumer product regulatory compliance throughout Europe, North America, and Australia. He offers high-level consulting and expert advisory services to retailers, brands, and manufacturers worldwide, specializing in regulatory frameworks for the UK, EU, and USA.

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