Josh Heltzer is a litigation support and sustainability expert based in New Jersey with more than 30 years of experience across federal, state, private-sector, civic, and international arenas.
Thomas Vorhies is an environmental attorney with over ten years of experience in the legal field, five of which were focused on litigation consulting and expert testimony support. He specializes in supporting experts retained for superfund allocation, natural resource damages assessment, toxic torts, legacy industrial contamination litigation, environmental class actions, and insurance recovery/defense.
Nicole Topor-Madry is a Toxicologist at J.S. Held with a strong academic background in chemistry and biochemistry. Her work centers on the intersection of chemical systems, human health, and environmental safety, with a focus on delivering data-driven solutions that align with regulatory standards and promote sustainable practices.
Joel Bailey is a Chartered Occupational Hygiene Professional with 20 years of experience in the Asbestos and Industrial Hygiene sector. He has extensive experience in consultancy related to asbestos management and compliance and possesses professional knowledge of exposure and control management for dust, fumes, and particulate exposure in the workplace. Joel has expertise in respirable crystalline silica, diesel fumes, toxic gases, welding fumes, working with lead and other heavy metals, and the hardwood working industry.
Jennifer Markfort brings extensive experience in emergency management, environmental assessment, and project oversight, supported by a decade of service in the United States Air Force. She has performed environmental evaluations involving mold, asbestos, lead, smoke, and other building-related contaminants, and has contributed to Phase I and II Environmental Site Assessments, Media Management Plans, remediation planning, and the development of SPCC and SWPPP programs.
Peter Tinkham is a senior technical expert and environmental engineer with over 20 years of experience in planning and executing complex projects across the US, Canada, France, Germany, the UK, the Netherlands, and Australia. He has led software solution implementation, support, and selection programs for large enterprise clients, and has developed comprehensive environmental compliance plans, procedures, and guidance documents to meet regulatory requirements. Peter’s expertise includes preparing and reviewing environmental permit applications, providing on-site compliance support, and delivering environmental, health, and safety technical guidance to industry personnel. He has also coordinated air emissions testing projects and is known for building strong client relationships while managing and mentoring junior and mid-level staff.
Dr. Scott Malm is a toxicologist and Certified Industrial Hygienist (CIH) with extensive experience in occupational and environmental health sciences, specializing in toxicology, industrial hygiene, and human health risk assessment. His work spans a wide range of exposure-related concerns, including emergency response, chemical risk evaluation, and litigation support across occupational, community, and consumer-based environments.
Jason House is a Technical Director at J.S. Held, specializing in groundwater modeling and remediation. He provides consulting services for various private-sector clientele throughout the United States. He has led complex projects involving site characterization, regulatory negotiations, cost estimating, and remedy/closure implementation. With over 20 years of experience in environmental consulting, his expertise spans a wide range of contaminants in multiple media as well as site complexities. He has provided support to clients across the U.S. in both technical and management roles.
Brian Desrosiers, MBA, CSP, OHST, CPSA, CCPSC, brings over 13 years of global experience in occupational safety, industrial hygiene, and Process Safety Management (PSM). He specializes in the development, implementation, and optimization of safety systems across a wide range of industries. Brian partners with clients to deliver strategic and innovative solutions for managing occupational risks, enhancing safety culture, and ensuring regulatory compliance.