Our Values

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

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 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 personalised approach and going the extra mile.

 To us Diversity means understanding that each individual is unique, recognising our individual differences and striving for diversity within our organisation 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.

Whether you are a nuclear professional looking for your next career move or a freelance assignment, we can help you.

Thomas Thor - Recruitment, Executive Search and Consulting in Nuclear

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

Our offices are in Europe, Middle East and North America. 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 Global in North America.

Building and Sustaining the Global Nuclear Workforce

About our history

Thomas Thor was founded in 2009 by three individuals that realised the need for an organisation dedicated to building and sustaining the global nuclear workforce. The nuclear energy industry is truly global and has been built on strong foundations of international cooperation over many decades. Our role is to support organisations in the nuclear industry in finding the professionals they need to succeed. As well as being extremely well connected within the global community of nuclear professionals, we also have a long and successful track record of bringing professionals from other industries and major projects to the nuclear industry. We act to increase diversity within the nuclear workforce in terms of gender, ethnicity, nationality and industry background, and our commitment to diversity is reflected in our own team.

Since 2009 we have grown from a single office in Amsterdam to an organisation with a truly global footprint and eight offices across Europe, North America and the Middle East. There are 60 of us delivering our core services in recruitment, executive search and HR consulting across the world. We strongly believe in well-being, and actively promote and facilitate initiatives to promote health, happiness and well-being within our organisation. I speak for our whole team when I say that we are proud to be working towards a clean energy future.


In order to provide the best services to all its stakeholders, Thomas Thor Associates have the following accreditations

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We are multilingual, international and opened to experienced science and business professionals willing to build and manage relationships with experts and organisations in the global nuclear sector.