Executive Team Members

Pierre Tremblay
President and Chief Executive Officer, Canadian Nuclear Safety Commission

Pierre Tremblay began his term as President and Chief Executive Officer of the Canadian Nuclear Safety Commission (CNSC) on August 12, 2024.

Mr. Tremblay is an accomplished leader with over 40 years of experience in nuclear engineering, security, operations, maintenance and management, including most recently as President of AECOM Canada Nuclear Services Inc.

He served as Chair of the CNSC’s Departmental Audit Committee from 2017 to 2023, providing advice and recommendations on our organization’s internal audit functions, frameworks and processes for risk management, control and governance. This role underscored his proven commitment to regulatory excellence and his support of our mandate to regulate the use of nuclear energy and materials to protect health, safety, security and the environment.

Mr. Tremblay began his career as a trainee engineer with Ontario Hydro (now Ontario Power Generation), where he rose through the ranks to become Chief Nuclear Operating Officer, responsible for the operation and maintenance of the nuclear fleet, achieving significant safety improvements.

He subsequently served as President of Canadian Nuclear Partners (now Laurentis Energy Partners Inc.), where he led trade missions to China, South Korea and India to create new opportunities for Canadian nuclear companies and their supply chains.

Mr. Tremblay is a Fellow of the Canadian Academy of Engineering, and holds a Master of Business Administration from the Rotman School of Management at the University of Toronto and a Bachelor of Science (Honours) in Chemical Engineering from Queen’s University.

Regulatory Operations Branch

Ramzi Jammal
Executive Vice-President and Chief Regulatory Operations Officer, Canadian Nuclear Safety Commission

Ramzi Jammal has accumulated over 35 years of experience in the nuclear industry, including working for the CNSC since 1998. His work combines executive management skills with scientific expertise, representing the CNSC in Canada and internationally. At the CNSC, Ramzi has occupied several roles, including serving as acting chief executive officer from October 2023 to August 2024. He is currently Executive Vice-President and Chief Regulatory Operations Officer.

Ramzi was the recipient of the prestigious 2021 Ian McRae award, honouring his substantive contribution to the advancement of nuclear energy in Canada.

Internationally, Ramzi’s exemplary work includes co-chairing the Fukushima Daiichi Accident Report (2015) and holding the role of President of the Convention on Nuclear Safety (2016–18). As a member of the International Atomic Energy Agency (IAEA) Commission on Safety Standards, he has been instrumental in the development of the IAEA Code of Conduct for the Safety and Security of Radioactive Sources and the international categorization of radioactive sources.

Ramzi was appointed Chair of the IAEA Regulatory Cooperation Forum (2022–25), which promotes international sharing of regulatory knowledge in order to achieve better safety outcomes.

In 2024, Ramzi was elected by consensus as President of the Eighth Review Meeting of the Contracting Parties to the Joint Convention on the Safety of Spent Fuel Management and on the Safety of Radioactive Waste Management for a period of 3 years. His priorities for this role are outlined in his speech to the Contracting Parties. Ramzi was the first Canadian to serve as President of the Joint Convention, and previously as President of the Convention on Nuclear Safety. This election underscores the trust and high regard that global nuclear regulatory peers have for his leadership, Canada’s role on the international stage and the CNSC’s strong commitment to safety.

Technical Support Branch

Dean Haslip
Vice-President, Technical Support Branch, and Chief Science Officer, Canadian Nuclear Safety Commission

Dean's extensive background in energy efficiency and nuclear physics positions him as a significant asset to the CNSC. His previous role at Natural Resources Canada, where he directed the Office of Energy Efficiency, highlights his capability in developing impactful policies like the Canada Green Buildings Strategy and in overseeing critical energy regulations.

With a PhD in nuclear structure physics, Dean combines scientific rigor with practical leadership experience. His tenure at CanmetENERGY-Ottawa, which involved directing research in various renewable energy technologies, further emphasizes his commitment to advancing Canada’s net-zero objectives. Additionally, his involvement in the multinational Mission Innovation initiative showcases his dedication to collaborative efforts in clean energy.

Dean's public service career, initiated at Defence Research and Development Canada, allowed him to rise through the ranks from research scientist to key leadership roles, emphasizing his expertise in radiological defence and operational research. His academic background, which includes contributions to the Sudbury Neutrino Observatory project, underlines his profound knowledge and passion for scientific advancement.

Overall, Dean’s multifaceted experience in energy efficiency and national defence will undoubtedly enhance the CNSC’s operational effectiveness and help navigate evolving challenges in the nuclear energy sector.

Regulatory Affairs Branch

Colin Moses
Vice-President, Regulatory Affairs, and Chief Communications Officer

Colin was appointed Vice-President Regulatory Affairs Branch and Chief Communications Officer in June 2024.

With over 20 years of progressively senior and diverse positions in the organization, Colin was most recently Director General of the Information Management and Technology Directorate and Chief Information Officer from 2020 to 2024. In this role, he was accountable for the implementation of the CNSC’s Digital Strategy, enabling a modern, trusted, agile digitally enabled regulatory body.

Previously, Colin was Director General of the Directorate of Nuclear Substance Regulation, where he was responsible for the delivery of the CNSC's nuclear substance regulatory program. Earlier roles in the CNSC include Executive Advisor in the Office of the President, as well as experience in regulatory policy, nuclear facility regulation and engineering assessment.

Colin holds a bachelor’s degree in mechanical engineering from McMaster University.

Corporate Services Branch

Stéphane Cyr
Vice-President, Corporate Services, and Chief Financial Officer

Stéphane Cyr has been Vice-President, Corporate Services, and Chief Financial Officer of the CNSC since 2013. He joined the CNSC in 2009 as Director General, Finance and Administration. Since then, he has overseen a number of major initiatives and projects, such as the establishment of a cost recovery–based financial framework, the construction of the CNSC’s laboratory, the introduction of an integrated management reporting framework and the development of a financial guarantee program. Stéphane led the CNSC’s Digital Transformation, Financial Management Transformation and Workforce Renewal Strategy, and most recently oversaw the development of the CNSC’s Future of Work initiative.

Stéphane has been the CNSC’s mental health and inclusion champion since 2016. 

From 2007 to 2009, Stéphane developed his skills at the Canadian Institutes of Health Research, where he held the position of Director General, Research Knowledge Creation Program, and later Director General, Finance and Corporate Planning.

From 2004 to 2007, Stéphane served as Executive Director, Financial Management Services, and Director, Transformation, at Human Resources and Social Development Canada. Prior to that, he worked at the Canadian Food Inspection Agency as Director, Accounting and Financial Systems, where he spearheaded, in particular, the implementation of the financial and reporting system and improvements to management and accounting practices.

He began his career at the Canadian International Development Agency, where he held several accounting and financial policy positions.

Stéphane is a graduate of the public service’s Executive Leadership Development Program (2018) and Accelerated Executive Development Program (2010), and the recipient of CPA Canada’s 2016 Award of Excellence in Innovation.

Stéphane is a member of the Chartered Professional Accountants of Canada and the Ordre des comptables professionnels agréés du Québec.

Legal and Commission Affairs Branch

Lisa Thiele
Vice-President, Legal and Commission Affairs, and Senior General Counsel

Lisa Thiele became Senior General Counsel at the CNSC in 2014. She is responsible for the CNSC’s in-house legal counsel team as well as for the Commission Registry, which is the hub for all of the Commission’s functions as a quasi-judicial tribunal and court of record.

Lisa has extensive experience and expertise in nuclear regulatory law at both the national and international levels. An active member of the International Nuclear Law Association, she serves on the Board of Directors of its Canadian branch, the Canadian Nuclear Law Organization. She has been on the faculty of the International Atomic Energy Agency’s Nuclear Law Institute since its inception and is a regular lecturer at the International School of Nuclear Law, a graduate diploma program offered at the University of Montpellier. She represents Canada as a member of the Nuclear Energy Agency’s Nuclear Law Committee and chairs its Working Party on the Legal Aspects of Nuclear Safety. She has been privileged to serve also as a lecturer and mentor in the World Nuclear University’s Summer Institute leadership program. Lisa has a strong commitment to excellence in nuclear law and takes a particular interest in encouraging women to be a part of its development.

With her experience and expertise in administrative law, Lisa also supports the Council of Canadian Administrative Tribunals’ training for tribunal members, delivering training to adjudicators on the conduct of quasi-judicial hearings and on the law of evidence in administrative law proceedings. Lisa was called to the Ontario Bar after a clerkship at the Federal Court of Canada, and she remains a member in good standing of the Law Society of Ontario. She holds undergraduate and law degrees from Queen’s University in Kingston, Ontario.