Dr. Larkin serves as an Associate Expert at Risk Sciences International, specializing in policy, regulatory analysis, and population health risk assessment. Her work with RSI has included life cycle assessments of metals, as well as a review of Alberta’s Water Cytotoxicity Testing Program. She contributes rigorous, equity-sensitive approaches to risk analysis, and brings a nuanced understanding of the intersections between policy, science, and public values.

Monique MacDonald is a seasoned Office Administrator with over thirty-five years of experience ensuring the smooth and efficient operation of office environments. She joined Risk Sciences International (RSI) in 2017, where she oversees the full range of internal operations and provides essential support across RSI’s scientific, operational, and client engagement activities. Her responsibilities include bookkeeping, financial support such as budgeting, invoicing, and expense tracking, as well as sales and marketing support. She also serves as operational and logistics coordinator for RSI’s convening events, including training sessions, workshops, and meetings.

Dr. Al-Zoughool has maintained a long-standing relationship with Risk Sciences International, both as a scientific collaborator and as a co-investigator on complex international projects. His work with RSI focuses on high-level public health risk modeling, mechanistic data analysis, and toxicological risk assessment of major environmental contaminants in air, soil, and water, including formaldehyde, lead, and 1,4-dioxane. His research also extends to methodological innovation and the development of evidence-based strategies for environmental and occupational health policy.

Dr. Michael G. Tyshenko is a Senior Health Risk Analyst at Risk Sciences International (RSI), where he has contributed since 2018 to some of the organization’s most complex and cross-cutting public health risk projects. As RSI’s lead on chemical peer reviews, he brings extensive experience in regulatory science, biological risk, and science-policy integration to high-stakes evaluations that require both deep expertise and clear communication.

Dr. Nataliya Karyakina is a Senior Toxicologist and Health Risk Analyst at Risk Sciences International (RSI), where she has served since 2008. She plays a central role in RSI’s work at the intersection of chemical safety, regulatory science, and human health. Drawing on more than three decades of experience, Dr. Karyakina contributes to complex projects involving the evaluation and assessment of hazardous properties of chemicals with different modes of action, hazard-based classification of chemical substances under CLP (EC) 1272/2008, and the development of health-based safety values for industrial and environmental chemicals for both workers and the general population.

As a Senior Advisor and Associate Expert with Risk Sciences International, Dr. Leiss contributes unparalleled insight into the design, delivery, and evaluation of risk communication strategies for government, regulatory bodies, and civil society. His legacy work in building public trust around controversial science and his decades of thought leadership on consensus-building, science-based policy, and societal responses to risk make him a foundational contributor to RSI’s mission.

Sean Hart is RSI’s Finance Officer and Bookkeeper, where he manages the company’s core financial operations and supports project-level accounting. With a strong command of both accounting principles and digital systems, Sean ensures the integrity, accuracy, and compliance of RSI’s financial records and reporting.

Since joining Risk Sciences International in 2019, Martin has served in Business Development, leading RSI’s business expansion efforts across Canadian and global markets. He is instrumental in identifying and qualifying opportunities, coordinating multidisciplinary proposal teams, developing project frameworks, and supporting contract negotiations. His expertise spans the entire procurement spectrum, including competitive tenders, standing offers, supply arrangements, and unsolicited proposals.

In Memoriam, Dr. Donald Mattison (1944-2026) Dr. Donald Mattison passed away at his home in Columbia, South Carolina on Sunday, March 22, with his family present. Don joined Risk Sciences International (RSI) in 2012 as Vice President and Chief Medical Officer, following a distinguished career spanning government, academia, and clinical practice in the United States. During his time at RSI, he contributed to 47 scientific publications and served as a trusted mentor and colleague to many across the organization.

As a Software Engineering Fellow at RSI, Dr. McNair brings unparalleled expertise in machine learning, Bayesian modeling, and decision-support systems. He supports RSI’s most advanced projects by designing and validating AI/ML architectures that meet both regulatory standards and ethical imperatives, including fairness, transparency, and distributive justice. His domain expertise spans from clinical prediction models to the risk analytics of high-reliability systems, with a particular focus on ensuring data quality and model interpretability.