By continuing to browse this site, you agree to our use of cookies. Read our privacy policy

IT Infrastructure Security Officer (P-3)


  • Organization: CTBTO - Comprehensive Nuclear Test Ban Treaty
  • Location: Vienna
  • Grade: Mid level - P-3, International Professional - Internationally recruited position
  • Occupational Groups:
    • Infrastructure and Urban-Rural development
    • Information Technology and Computer Science
    • Security and Safety
  • Closing Date: Closed
VA ID:  1602
Grade Level:  P-3
Division:  International Monitoring System Division
Section:  Network and Systems Support Section
Type of Appointment:  Fixed Term Appointment
Date of Issuance:   5 January 2023
Deadline for Applications:
Vacancy Reference:  VA344-1602-2023
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).

This position is located in Network and Systems Support Section (NSS), International Monitoring System Division. The NSS provides all office automation, collaborations, and core infrastructure services to the rest of the Organization.

Reporting Lines

Under the supervision of the Chief, Network and Systems Support Section, to:

Duties and Responsibilities

  1. Manage IT security systems to prevent and detect threats and vulnerabilities against the infrastructure and platforms; 
  2. Deploy and optimize IT infrastructure and platforms security systems;
  3. Conduct research and develop proposals to improve the effectiveness of policies and procedures, contribute towards operational support for the development and implementation of IT infrastructure and platforms security incidents response procedures;
  4. Manage specific security services, including web and mail protection, Certificate Services, Privileged Access and permissions management, MultiFactor authentication, Endpoint protection, Mobile device and applications management;
  5. Maintain a variety of cloud-native security solutions, develop automation pipelines and custom scripts,  manage digital identities and cloud access rights, and responds to user technical problems;
  6. Ensure the alignment of IT infrastructure and platform configurations in accordance with the regulations and rules, information security policies and security baseline. 
  7. Implement, monitor, evaluate, and operate a wide range of IT infrastructure security management processes, policies, and procedures. Draft and review comprehensive technical specifications, manuals, and other user documentation. Contribute to the development and implementation of customer support, training modules and manuals.
  8. Work with other divisions and sections throughout the Organization and with external security service providers to respond to specific security events and automate protection;
  9. Perform other duties as assigned.


  • University degree in computer sciences, information security, engineering or a related field;

Work Experience and Qualifications

  • At least five (5) years working experience in computer technology, including in the deployment and administration of information security systems, preferably part of which should have been in an international environment;
  • Experience with conducting highly technical analysis and reporting of cloud and on-premises security incidents is required; Experience working in a security operations center is desirable;
  • Hands-on experience in the administration of Directory Services, especially Microsoft Active Directory Domain Services (AD DS), Certificate Services (AD CS), and Azure Active Directory Domain Services (Azure AD DS) is required;
  • Proven hands-on experience in the administration of Microsoft 365 and Azure security services is required; Experience with Azure Logic apps, and Python is desirable;
  • Solid operating knowledge in both Windows and Linux is required;
  • Extensive hands-on experience in cloud-native Security Information and Event Management (SIEM), Security Orchestration, Automation, and Response (SOAR) solutions, especially Microsoft Sentinel, is required;
  • Extensive experience with Threat and Vulnerability Management on critical production systems is required;
  • Microsoft 365 Certifications such as Enterprise Administrator Expert and Cybersecurity Expert are desirable;
  • Security certifications such as CISSP, GIAC/GCFA, CCSP, GIAC, OSCP etc., and cloud security certifications such as CCSP and other public cloud certifications (Azure) are desirable;
  • Strong analytical skills and ability to draft concise and informative security operations, threat information, and risk management reports are required;
  • Comprehensive knowledge of project management and IT Service management is required. ITIL certification is desirable.
  • Excellent organizational skills and the proven ability to deliver projects within assigned deadlines;
  • Ability to prioritize and manage a high-volume workload in a fast-paced work environment;
  • Strong customer/user orientation and ability to communicate easily and well with a both technical and non-technical staff at all levels in a multicultural environment, with respect and sensitivity for diversity;
  • Ability to work effectively in multi-disciplinary teams;


  • 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.
However, we have found similar vacancies for you: