Our Values

To us Results means an opportunity to celebrate success. We are all fully accountable for accomplishing the objectives and targets that we set. The end result of matching a candidate with a client creates happy clients, happy candidates and happy colleagues.

Driven by curiosity and resourcefulness, Credibility means combining our knowledge of the nuclear sector with our expertise in representing and advising candidates, in order to provide a valuable service to our colleagues and to the global nuclear industry.

We are proud to be a Fair, Inclusive and Diverse organisation. To us, this means putting ourselves in the shoes of our colleagues, candidates and clients to ensure that all perspectives are considered when we act, which we always aim to do with fairness and integrity.

To us Team means working together with colleagues and industry contacts towards common goals, promoting diversity, acting with respect and energising one other.

To us Excellence means delivering the highest possible quality of service, communication and interaction to our colleagues and industry contacts, always striving to exceed their expectations.

Based on trust, Relationships means creating and maintaining open, honest, long term and strong bonds with our colleagues and industry contacts.

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.

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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.

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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.

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Our Leadership Team

Callum Thomas

Callum Thomas

Founder and CEO of Thomas Thor Associates and Chairman of KeySource Global

Keith Wing

Keith Wing

Advisor to the Board for KeySource Global and Thomas Thor Associates

Tim Walker

Tim Walker

Thomas Thor Associates and KeySource Global Managing Director

Gaetan Deshais

Gaetan Deshais

Thomas Thor Associates Middle East and North Africa Business Director

Nick Messenger

Nick Messenger

Thomas Thor Associates Global Business Development Director

James Ball

James Ball

Thomas Thor Associates and KeySource Global Head of Operations and Compliance

Eve Guilloton

Eve Guilloton

Thomas Thor Associates Vice President Sales Canada

Join us

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.