Job Description

We are looking for an AI Security Engineer to join our Security Ai Operations teamin Portooffice where you will have the opportunity to lead the design, implementation, and governance of secure AI systems built on Microsoft Azure AI Foundry and Copilot agent frameworks. You will be the primary owner of AI-specific security controls, responsible for safeguarding model pipelines, agentic workflows, and enterprise data from emerging threats in the generative AI landscape.

Key Accountabilities

AI Platform Security — Azure AI Foundry

Design and enforce security baselines for Azure AI Foundry workspaces, including network isolation, private endpoints, managed identity configurations, and role-based access control (RBAC).

Conduct threat modelling for model training and inference pipelines,identifyingrisks such as model inversion, data poisoning, and supply chain compromise.

Implement andmaintainencryption-at-rest and in-transit controls for model artefacts, training datasets, and inference outputs stored in Azure Blob Storage and Azure Data Lake.

Define and audit Azure Policy assignments to enforce guardrails across AI resource groups, preventing misconfiguration at scale.

Evaluate and harden Azure AI Foundry Prompt Flow deployments, reviewing flow logic, external connectors, and output sanitisation.

Copilot Agent Security

Assess and secure Microsoft Copilot Studio agents and custom Copilot extensions, focusing on plugin trust boundaries, Graph API permission scopes, and data exfiltration vectors.

Develop and test countermeasures against prompt injection, jailbreaking, and indirect instruction attacks targeting deployed agents.

Review and approve connector configurations for Copilot agents accessing enterprise systems (SharePoint, Dynamics, third-party APIs), applying least-privilege principles.

Build automated adversarial test suites (red-teaming pipelines) that continuously probe production agents for policy violations, sensitive data leakage, and behavioural drift.

Collaborate with Microsoft Purview and Defender for Cloud teams to extend data loss prevention (DLP) policies to AI-generated outputs.

Model Governance & Compliance

Own the AI model risk register, documenting risk ratings, residual risks, and accepted exceptions for all models in production.

Map AI system controls to relevant frameworks including ISO 42001, NIST AI RMF, EU AI Act requirements, and internal enterprise risk policies.

Design model card and system card templates that capture security-relevant metadata (training data provenance, known limitations, misuse potential) for all deployed models.

Lead periodic AI security reviews, producing actionable remediation plans with severity ratings aligned to CVSS and OWASP LLM Top 10.

Support audit, legal, and procurement teams with third-party AI vendor security assessments and due diligence questionnaires.

SkillsRequiredto be successful in the role:

• Minimum 3 years of higher education in IT, cybersecurity, or risk management, or equivalent experience

• BSc in Cybersecurity preferred

• BSc Computer Science, Economics, International affairs,Lawor equivalent

• Knowledge and passion about IT and Information Security

• Fluency in both spoken and written English

• Strong experience in Azure cloud security, including RBAC, managed identities, and network isolation

• Proven ability to design and enforce security controls and policiesin cloud environments (e.g., Azure Policy)

• Solid understanding of AI/ML security risks, including prompt injection, data poisoning, and model vulnerabilities

• Hands-on experience with threat modellingand risk assessment methodologies

• Knowledge of encryption standardsand secure data handling (at rest and in transit)

• Experience securing AI/ML pipelines(training, deployment, and inference)

• Familiarity with Microsoft security ecosystem (e.g., Azure AI, Copilot, Graph API, Defender, Purview)

• Ability to implement automated security testing and red-teamingpractices

• Strong communicationskills with the ability to translate technical risks into business-relevant insights

• Good verbal communications skills;

• Excellent organizational skills;

• Pro-active and sense of ownership;

Applyby submittinga CV in English.

Join Euronext – Shape capital markets for future generations

Euronext is the leading European capital market covering the entire capital markets value chain,from listing, trading, clearing, settlement and custody,to solutions for issuers and investors. Weoperateseven national stock exchanges, handling 25% of European lit equity trading. Our products include equities, FX, ETFs, bonds, derivatives,commoditiesand indices. Euronext also provides clearing and settlement services through Euronext Clearing and our network of Euronext Securities CSDs. In addition, Euronext runs MTS, one of Europe’s leading electronic fixed income trading markets, and Nord Pool, the European power market. The company has a diverse domestic and international client base

Find out more about us at: Euronextcom

Euronext Values

Unity

• We respect and value the people we work with

• We are unified through a common purpose

• We embrace diversity and strive for inclusion

Integrity

• We value transparency, communicate honestly and share information openly

• We act with integrity in everything we do

• We don’t hide our mistakes, and we learn from them

Agility

• We act with a sense of urgency and decisiveness

• We are adaptable, responsive and embrace change

• We take smart risks

Energy

• We are positively driven to make a difference and challenge the status quo

• We focus on and encourage personal leadership

• We motivate each other with our ambition

Accountability

• We deliver maximum value to our customers and stakeholders

• We take ownership and are accountable for the outcome

• We reward and celebrate performance

We are proud to be an equal opportunity employer. We do not discriminate against individuals on the basis of race, gender, age, citizenship, religion, sexual orientation, gender identity or expression, disability, or any other legally protected factor. We value the unique talents of all our people, who come from diverse backgrounds with different personal experiences and points of view and we are committed to providing an environment of mutual respect.

Additional Information

This job description is only describing the main activities within a certain role and is not exhaustive. It does not prevent to add more tasks, projects.