Senior Investigator (P-4)

Organisation for the Prohibition of Chemical Weapons - OPCW

Staff Closes 04 Jul 2026 28 days left

Overview

Conducts complex investigations in support of OPCW special missions, including fact-finding, identification of perpetrators, and activities related to alleged chemical weapons.


Key Responsibilities
  • Plan, design, and conduct complex investigations, including defining scope, methodology, and operational approach.
  • Develop investigative strategies, hypotheses, and lines of inquiry.
  • Lead multidisciplinary investigative teams.
  • Ensure effective coordination of investigative activities across OSM functions.
  • Lead or participate in field deployments, including in high-risk or austere environments.
  • Conduct and supervise interviews with witnesses and other sources.
  • Oversee on-site evidence collection and preliminary analysis.
  • Provide real-time operational leadership and decision-making during missions.
  • Oversee the collection of evidence from multiple sources.
  • Ensure strict adherence to chain-of-custody procedures and evidentiary standards.
  • Direct the validation, corroboration, and integration of information from diverse sources.
  • Ensure secure handling and storage of sensitive and classified information.
  • Guide and review work produced by analysts, investigators and technical experts.
  • Ensure the application of structured analytical methodologies and best practices.
  • Identify evidentiary gaps, inconsistencies, and areas requiring further investigation.
  • Integrate technical, analytical, and legal findings into coherent investigative outcome.
  • Ensure that investigations and outputs are aligned with international legal standards and OPCW policies.
  • Draft and review sections of investigative reports.
  • Contribute to the preparation of high-level reports for OPCW policy-making organs.
  • Provide input related to investigations in legal-analytical discussions and review processes.
  • Liaise with OPCW divisions, States Parties, and any other external partners as required.
  • Represent OSM in technical meetings and briefings, when required.
  • Facilitate coordination with international investigative and accountability mechanisms, when required.
  • Mentor and supervise junior investigators and analysts, as well as field teams.
  • Contribute to the development of investigative methodologies, Standard Operating Procedures, and best practices.
  • Support training initiatives within OSM.
Required Experience
  • A minimum of 7 years of progressively responsible experience at a senior level in complex investigations in areas such as international or national criminal investigations.
  • Experience in investigation activities at the international level.
  • Experience in gathering evidence and interviewing techniques for investigation purposes.
  • Knowledge and hands-on experience of theories, concepts, and approaches to information and fact collection methodologies.
  • Experience with or knowledge of forensics.
  • Willingness and ability to travel frequently and work in high-risk environments.
  • Knowledge and understanding of multilateral disarmament issues, including understanding of the Chemical Weapons Convention and related disarmament/non-proliferation frameworks (desirable).
  • Experience in investigations into the use, development, production, or storage of chemical weapons is highly desirable.
  • Formal training and/or certification in law enforcement methodologies (desirable).
  • Experience with or knowledge of military operations in conflict zones (desirable).
  • Knowledge and understanding of multilateral disarmament issues (desirable).
  • Experience handling sensitive and potentially distressing material, with demonstrated emotional resilience and the ability to maintain professional objectivity (desirable).
  • Familiarity with cognitive disassociation mechanisms and strategies to reduce vulnerability factors (desirable).
Qualifications
  • Advanced university degree in Criminal Investigation, Forensic Science, Crime Analysis, Social/Political Science, or other related fields.
  • A first level university degree, combined with 9 years of relevant experience may be accepted in lieu of the advanced university degree.
  • Diploma in advanced criminal investigation from a national police academy or law enforcement agency and/or certifications in investigations (military, police, judicial/prosecutorial, federal/national intelligence agencies) together with significant experience (13 years) may be accepted in lieu of the university degree.
Other Details
Languages Required
• Fluency in English is essential
Languages Preferred
• A good working knowledge of one of the other official languages (Arabic, Chinese, French, Russian, and Spanish) is desirable.
Contract Duration
• two years
Work Modality
• field deployments, including in high-risk or austere environments • back at The Hague duty station
Remuneration
• Total Estimated monthly remuneration depending on post adjustment and family status: USD USD 10,672
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