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CTBTO - Comprehensive Nuclear-Test-Ban Treaty Organization

What is the CTBT? 

The Comprehensive Nuclear-Test-Ban Treaty (CTBT) bans nuclear explosions by everyone, everywhere: on the Earth’s surface, in the atmosphere, underwater and underground.

Why is the CTBT important?

It makes it very difficult for countries to develop nuclear bombs for the first time, or for countries that already have them, to make more powerful bombs. It also prevents the huge damage caused by radioactivity from nuclear explosions to humans, animals and plants.

Many attempts were made during the Cold War to negotiate a comprehensive test ban, but it was only in the 1990s that the Treaty became a reality. The CTBT was negotiated in Geneva between 1994 and 1996.

Headquarters in Vienna

Since the Treaty is not yet in force, the organization is called the Preparatory Commission for the Comprehensive Nuclear-Test-Ban Organization (CTBTO). It was founded in 1996, has over 260 staff from over 70 countries, and is based in Vienna. The CTBTO’s main tasks are the promotion of the Treaty and the build-up of the verification regime so that it is operational when the Treaty enters into force. 

The Provisional Technical Secretariat (PTS)

The PTS started its work in Vienna on 17 March 1997.  The main function of the PTS is to assist the Preparatory Commission in the establishment of a global verification regime to monitor compliance with the comprehensive ban on explosive nuclear testing. Another PTS function is to promote the signing and ratification of the Treaty so that it enters into force as soon as possible. The PTS staff is multinational in composition. However, only nationals of Signatory States are eligible to serve in the PTS.

Join us to put an end to nuclear explosions

The Organization considers its staff and their expertise to be its most important resource. The CTBTO provides exciting employment opportunities in a richly diverse work environment for high calibre candidates with scientific and technical qualifications, as well as for those with management and non-technical skills. The Organization prioritizes and promotes the highest standards of professional competence, experience and integrity.

CTBTO is committed to diversity and inclusion within its workforce and encourages qualified female and male candidates from all national, religious and ethnic backgrounds, including persons living with disabilities, to apply to become a part of our Organization.   

For a step-by-step guide on how to apply to CTBTO vacancies, to learn more about the employment opportunities at the CTBTO and the recruitment process, please click HERE.

From now on, you will find all positions of CTBTO at Impactpool, update your Impactpool profile to stay alerted when featured CTBTO jobs are posted. Find information on how to apply in the job advertisements. When sending your application, please indicate that you found the opportunity at