About Us

Thomas Thor

Recruitment, Executive Search and Consulting in Nuclear

Thomas Thor Associates provides recruitment, executive search and consulting services to the global nuclear industry. Our clients include nuclear regulators, operators, engineering companies, equipment manufacturers and research organizations.

Our offices are in Canada, the United States, Europe, and the Middle East. Our multinational and multilingual staff have an unrivalled global network in the nuclear industry. Following the union of Thomas Thor and KeySource HCI in 2016, we proudly operate as KeySource Thomas Thor in North America.

We value integrity, credibility, teamwork, excellence, and relationships to produce outstanding results.

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Our Values


To us Excellence means delivering the highest possible quality of service, communication and interaction to our colleagues and clients, always striving to exceed their expectations through a personalized approach and going the extra mile.

Diversity and Inclusion

To us Diversity means understanding that each individual is unique, recognising our individual differences and striving for diversity within our organization and within the industries we serve. To us Inclusion means creating an environment where all individuals feel a sense of belonging and are heard and respected.


To us credibility means inspiring belief and trust through combining our knowledge with our expertise in representing and advising candidates, in order to provide a valuable service to our colleagues and to our clients.


To us Collaboration means working together with our colleagues and stakeholders, supporting each other to achieve our shared goals and objectives.

Canadian Nuclear Laboratories

CNL is a world leader in developing peaceful and innovative applications from nuclear technology through its expertise in physics, metallurgy, chemistry, biology and engineering.

Highly skilled employees enthusiastically deliver a range of nuclear services – ranging from research and development, design and engineering to specialized technology, waste management and decommissioning.

Today, CNL continues its commitment to ensure that Canadians and the world receive energy, health, and environmental benefits from nuclear science and technology with confidence that nuclear safety and security are assured.

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