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The following posts are in no particular order. They are purposely randomized.

RSI Team

Tee L. Guidotti

Dr. Tee L. Guidotti is an esteemed international consultant in occupational and environmental medicine, specializing in risk management and sustainability. His work encompasses problem-solving, medical evaluation, medicolegal services, and extensive publishing and writing. Although retired from the George Washington University, he maintains active roles in teaching and research, holding adjunct faculty positions at West Virginia University and the University of Alberta. His interests span energy technologies, firefighter health, climate change adaptation, and science policy. Dr. Guidotti's contributions include over 300 papers, eight books, and numerous awards, notably the Knudsen Award for Lifetime Achievement in Occupational and Environmental Medicine in 2013. His focus now centers on environmental sustainability and health.
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RSI Team

Douglas McNair

Since 2002, Mr. McNair has led key aspects of Cerner's Big Data operations, ensuring data quality for over 700 healthcare institutions. His role focuses on using this data for predictive models and decision-support solutions. McNair's career at Cerner began in 1986, where he co-invented Discern Expert®, a real-time decision-support engine used globally. He held positions in regulatory affairs, served as a General Manager, and worked in pharmaceutical roles. McNair is a prominent figure in mathematical modeling, AI, and health finance, with over 100 patents and numerous publications. He's also active in volunteer work and academic pursuits.
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RSI Team

Sean Hart

With 20+ years experience in accounting and 12+ years experience in web development, I spend half of my time as a finance officer and bookkeeper. The other half of my time is spent coding, deploying, consulting and maintaining a variety of management web applications.
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RSI Team

John Lark

John Lark is a globally recognized expert in risk management, with a distinguished career spanning leadership roles in research, committee chairing, and board-level facilitation. He collaborates with international bodies, including the OECD, US EPA, and ISO. Mr. Lark's expertise extends to speaking engagements at prominent conferences worldwide. He holds the CPRM certification and actively contributes to ISO committees. His extensive board experience includes chairing two not-for-profit boards and participating in major charities. He earned the ICD.D designation through the Director's Education Program. Mr. Lark authored the international ISO Guide for implementing ISO 31000:2009.
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RSI Team

Patricia Larkin

Dr. Patricia Larkin's career is dedicated to policy and regulatory assessments, focusing on the intersection of social determinants of health and health equity. Her expertise lies in managing human health and environmental risks, particularly in energy, water resources, and climate change. Patricia's research explores Canadian innovation in energy regulatory decision-making and its impact on risk management. She has led interdisciplinary international research projects, addressing risk management in public decision-making and environmental issues like carbon capture and storage. As Chair of the Applied Risk Management Specialty Group of the Society for Risk Analysis, she continues to contribute to this field.
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Experts

Hong Duan

With a B.Sc. in Computer Science from the University of Ottawa and over a decade of experience, Hong Duan specializes in database-driven web projects. A Microsoft certified .NET developer, she previously worked at Wireless Werx Inc. Since joining RSI in 2011, her expertise has contributed to high-quality software development for clients like the Public Health Agency of Canada, the U.S. FDA, and international organizations such as FAO and WHO.
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Experts

Shintaro Hagiwara

Dr. Shintaro Hagiwara is a Risk Analyst and Statistician at Risk Sciences International (RSI), where he contributes cutting-edge statistical insight to risk assessments, particularly in chemical safety and public health. Since joining RSI’s technical team in 2018 and transitioning to a full-time role in 2023, he has applied his deep quantitative knowledge to building theoretical foundations and developing statistical software. Notably, he created the database-calibrated assessment process (DCAP) and the enhanced value-of-information (VOI) framework to aid in evidence-based regulatory decision-making, both of which have been reviewed by the board of scientific counselors (BOSC). His applied statistical work provides assessments and tools to derive PODs for chemicals such as inorganic arsenic and fluoride to support both Canadian and international regulatory bodies.
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RSI Team

C. Calvin Willhite

Dr. Calvin Willhite is a renowned expert in developmental toxicology and quantitative structure-activity relationships, with a substantial publication record. He has played key roles in influential organizations and committees, including the National Academy's Committee on Toxicology, the U.S. EPA's National Advisory Committee, and the IARC Cancer Chemoprevention Panel. Dr. Willhite is a member of the Society of Toxicology and is featured in notable biographical publications. Currently, he serves as an Associate Expert with Risk Sciences International, contributing to health risk assessments for various chemicals, both man-made and naturally-occurring.
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Senior experts

Todd Ruthman

Todd Ruthman serves as Vice‑President, Software and Modelling Solutions at Risk Sciences International (RSI) and has been with RSI since its founding in 2006. With a BASc in Systems Design Engineering from the University of Waterloo, Todd strives to understand the complex interactions in systems -- a perspective that he channels into the design of data-driven, evidence-based decision-support applications for RSI’s clients. His team crafts custom IT solutions and leverages tools such as SQL Server, .NET,  Python, Excel, and R, to translate complex risk scenarios into interactive decision-support platforms.
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Experts

Paul Price

With 45 years of experience in exposure and risk assessment, Dr. Paul Price has worked with diverse organizations, including the U.S. EPA and Dow Chemical. Specializing in mixture risk assessments, he is an adjunct professor at the University of Iowa and serves on the European Food Safety Authority’s committee on combined exposures. A prolific author, Dr. Price is currently focused on publications concerning mixture risk assessment and the Mixture Adjustment Factor.
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