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Maintenance Engineer - Radionuclide and Noble Gas (P-3)


  • Organization: CTBTO - Comprehensive Nuclear Test Ban Treaty
  • Location: Vienna
  • Grade: Mid level - P-3, International Professional - Internationally recruited position
  • Occupational Groups:
    • Operations and Administrations
    • Engineering
    • Physics and Mathematics
    • Logistics
    • Supply Chain
    • Nuclear Technology
    • Mechanics and Electronics (Engineering)
  • Closing Date: Closed
VA ID:  1622
Grade Level:  P-3
Division:  International Monitoring System Division
Section:  Monitoring Facilities Support Section
Unit:  Maintenance Unit
Type of Appointment:  Fixed Term Appointment
Date of Issuance:   16 January 2023
Deadline for Applications:
Vacancy Reference:  VA27-1622-2023
Reporting Date:  As soon as possible

Please note that all candidates should adhere to CTBTO Values of Integrity, Professionalism and Respect for Diversity.

Qualified female applicants and persons with disabilities are encouraged to apply.

 A roster of suitable candidates may be established for similar positions at the same level as a result of this selection process for a period of two (2) years.

Organizational Background

The Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization with its headquarters in Vienna, Austria is the international organization setting up the global verification system foreseen under the Comprehensive Nuclear-Test-Ban Treaty (CTBT), which is the treaty banning any nuclear-weapon-test explosion or any other nuclear explosion. The Treaty provides for a global verification regime, including a network of 337 stations worldwide, a communications system, an international data centre and on-site inspections to monitor compliance.

Organizational Setting

The International Monitoring System Division (IMS) is a technical division that applies engineering and science to develop, install, certify, maintain and sustain stations around the world as well as related analysis products. The monitoring stations are based on four different sensor technologies (seismic, hydroacoustic, infrasound and radionuclide).

Reporting Lines

Under the supervision of the Head, Maintenance Unit, to:

Duties and Responsibilities

  1. Organize and implement maintenance activities for facilities of the International Monitoring System (IMS), including corrective and preventive maintenance, overhauls, replacements, and coordination with equipment providers, station operators and other contractors;
  2. Perform IMS station troubleshooting, conduct on-site visits to inspect, maintain or repair installations as needed, and prepare related reports;
  3. Support the evaluation of station performance, including review, preliminary evaluation, classification of reports and upkeep of station records; 
  4. Support the development and implementation of procedures for the reliable operation, maintenance and overall sustainment of IMS facilities, including the development and review of station specific technical documentation; 
  5. Provide input into the establishment of contractual arrangements and agreements with designated institutions in host countries and other institutions for services required to sustain IMS facilities;
  6. Liaise with government officials in countries that host IMS facilities on matters relating to the maintenance and support of IMS stations; 
  7. In coordination with Logistics Support Unit, track equipment downtime, problem history, and provide support to sustainment efforts for IMS stations;
  8. Prepare information and present material for the IMS technical training programme and workshops;
  9.  Perform other duties as assigned.


  • University degree in nuclear science, engineering or a related field.

Work Experience and Qualifications

  • At least five (5) years relevant working experience in radionuclide and noble gas monitoring, radiation, computer interfacing and networking, communication technology, power systems as well as familiarity with maintenance of installations in harsh/remote environments and of computer-based systems; 
  • Work experience within national or international monitoring networks is desirable;
  • Strong analytical skills and experience in producing reports and papers on technical issues is required;
  • Excellent organizational skills and proven ability to deliver projects within assigned deadlines are essential;
  • Ability to prioritize and manage a high-volume workload in a fast-paced work environment.
  • Strong ability to communicate effectively in multicultural environment is essential.


  • Excellent written and oral communication skills in English are essential;
  • Knowledge of other official CTBTO languages (Arabic, Chinese, French, Russian and Spanish) is desirable.


  • Professionalism - Shows pride in work and in achievements; demonstrates professional competence and mastery of subject matter; is conscientious and efficient in meeting commitments, observing deadlines and achieving results; is motivated by professional rather than personal concerns; shows persistence when faced with difficult problems or challenges; remains calm in stressful situations;
  • Communication - Speaks and writes clearly and effectively; listens to others, correctly interprets messages from other and responds appropriately; asks questions to clarify, and exhibits interest in having two-way communication; tailors language, tone, style and format to match the audience; demonstrates openness in sharing information and keeping people informed;
  • Planning and organizing - Develops clear goals that are consistent with agreed strategies; identifies priority activities and assignments; allocates appropriate amount of time and resources for completing work; foresees risks and allows for contingencies when planning; monitors and adjusts plans and actions as necessary;
  • Team work - Works collaboratively with colleagues to achieve organisational goals; solicits input by genuinely valuing others' ideas and expertise; is willing to learn from others; places team agenda before personal agenda; builds consensus for task purpose and direction with team members; supports and acts in accordance with final group decisions, even when such decisions may not entirely reflect own position; shares credit for team accomplishments and accepts joint responsibility for team shortcomings;
  • Accountability - Takes ownership of all responsibilities and honors commitments; delivers outputs for which one has responsibility within prescribed time, cost and quality standards; operates in compliance with organizational regulations and rules; supports subordinates, provides oversight and takes responsibility for delegated assignments; takes personal responsibility for his/her own shortcomings and those of the work unit, where applicable;
  • Creativity - Actively seeks to improve programmes or services; offers new and different options to solve problems or meet client needs; promotes and persuades others to consider new ideas; takes calculated risks on new and unusual ideas; thinks “outside the box”; takes an interest in new ideas and new ways of doing things; is not bound by current thinking or traditional approaches; 
  • Client orientation - Considers all those to whom services are provided to be “clients” and seeks to see things from clients’ point of view; establishes and maintains productive relationships with clients by gaining their trust and respect; identifies clients’ needs and matches them to appropriate solutions; monitors ongoing developments inside and outside the clients’ environment to keep informed and anticipate problems; keeps clients informed of progress and setbacks in projects; meets timeline for delivery of products or services to clients;
  • Commitment to continuous learning - Keeps abreast of new developments in own occupation/profession; actively seeks to develop oneself professionally and personally; contributes to the learning of colleagues and subordinates; shows willingness to learn from others; seeks feedback to learn and improve;
  • Technological Awareness - Keeps abreast of available technology; understands applicability and limitations of technology to the work of the office; actively seeks to apply technology to appropriate tasks, shows willingness to learn new technology.


CTBTO offers an attractive compensation and benefits package in accordance with the policies of the International Civil Service Commission. For more information on UN salaries, allowances and benefits, see link: The salary offered may be subject to deductions to the United Nations Joint Staff Pension Fund and/or Health Insurance Scheme.

Additional Information

  • All applications must be submitted through the CTBTO e-Recruitment system before the deadline stated in the vacancy announcement.
  • Incomplete applications and submission of employment history in formats other than the CTBTO Employment Information Form will not be considered.
  • 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 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.
  • Please note that the CTBTO will only consider academic credentials or degrees obtained from an educational institution recognized in the IAU/UNESCO list.
  • The CTBTO reserves the right to undertake correspondence only with shortlisted candidates.
  • Candidates under serious consideration for selection will be subject to a reference-checking process or be requested to provide performance assessments.
This vacancy is now closed.
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