Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) - On-site inspection division internship


International Organizations

Location (s):

  • Austria


The Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) is an international organization located in Vienna, Austria. Its main task is to establish a global verification regime to monitor compliance with the Comprehensive Nuclear-Test-Ban Treaty (CTBT), which bans all nuclear explosions. The verification regime includes a global network of 337 monitoring facilities, using four different technologies (seismic, hydroacoustic, infrasound and radionuclide), a communications infrastructure, an international data centre, and the capability to carry out on-site inspections.



The CTBTO awards a limited number of internships to university students and recent graduates from diverse academic background. Its purpose is to provide a learning and development experience in a field related to the Commission’s activities specialized in various professional fields. Interns usually work on specific practical assignments. Opportunities for internships are available subject to the current needs of the individual divisions within the CTBTO. 

The On-Site Inspection (OSI) Division develops operational capabilities to undertake inspections in line with the provisions of the CTBT. After the treaty enters into force, an on-site inspection (OSI) is launched to establish whether or not a nuclear explosion has been carried out. During such an inspection, facts might also be gathered to identify a possible violator of the Treaty. It thus constitutes the final verification measure under the CTBT. 


Under the close supervision of the Coordinator, OSI and in coordination with the responsible Officer(s), the Intern shall support in the planning of CTBT On-Site Inspection exercises, in particular:

  • contribute intellectually to discussions, e.g. with points of policy that relate to the CTBT;
  • assist with research on a theme relating to the CTBT, which, depending on expertise and interest could touch on policy, strategic, legal, or scientific/technical aspects of on-site inspections;
  • contribute to process improvements in line with good practice in project management;
  • support the implement of improvements, as directed;
  • Perform other duties as assigned.

How To Apply:

All applications should be made via the CTBTO e-Recruitment system before the deadline stated in the vacancy announcement.

The CTBTO Preparatory Commission retains the discretion not to make any appointment to this vacancy; to make an appointment at a lower grade in particular if the selected candidate has less than the qualifications required; to make an appointment with a modified job description, or to offer a contract term for a shorter duration than indicated in the Vacancy Announcement.

The CTBTO Preparatory Commission reserves the right to undertake correspondence only with shortlisted candidates.

Opportunity is About:


Candidates should be from:

Description of Ideal Candidate:


Education: The applicant must have completed at least two years of full-time study that will lead to the award of a degree in any thematic area. Applications may be may up to two years after completion of a bachelor’s, master’s or doctoral degree. 

Knowledge or interest in at least one of the following areas: Arms control/non-proliferation/disarmament, international/external/public relations, project management, strategy and policy, planning of exercises, verification of treaty obligations, or operational command and control. 

Language: The applicant must possess excellent written and oral communication in English. Working knowledge of another official language of the CTBTO Preparatory Commission is an asset.


  • Professionalism – Conscientious and efficient in meeting commitments, observing deadlines and achieving results. 
  • Planning and Organizing – Ability to work under pressure. 
  • Communication – Excellent written and oral communication skills in English; Proven and sustained communication (verbal and written) skills with people from different backgrounds. 
  • Teamwork - Proven interpersonal skills and the ability to listen and work in a multi-cultural, multi-ethnic environment with sensitivity and respect for diversity. 

PLEASE NOTE: Interested candidates must complete the Personal History Form (PHF) in the eRecruitment system. Applications must provide two signed letters of recommendation upon request. Additional information relevant to your application including a letter of interest must be provided at item 30, “Other Information”. The letter of interest (maximum 600 words) will include: Choose at least one of the areas listed in the section on “knowledge or interest” (see “Qualifications and experience”) and discuss, in the context of CTBT on-site inspections and the internship duties (see “Main duties and responsibilities”), how you believe your internship experience may subsequently enable you to make a contribution to improved global security in the next five years. 

Internship opportunities occur through the year and assignments are filled as required by the CTBTO. Due to the volume of applications received, correspondence will be maintained only with those candidates that are under consideration. Thank you for your understanding. 

An intern is neither a staff member nor an official of the Commission. An intern who is a non-Austrian citizen is responsible for obtaining any necessary visas and for complying with local laws concerning police registration.


Deadline: As soon as possible

Cost/funding for participants:

Internships generally should not be shorter than three months and not longer than six months on a full-time basis. An intern is neither a staff member nor an official of the Commission.

An intern who is a non-Austrian citizen is responsible for obtaining any necessary visas and for complying with local laws concerning police registration. As the CTBTO cannot provide financial support for interns, all successful applicants are expected to make their own arrangements for travel, lodging, living expenses and insurance during the internship period.

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