AI Security Engineer

Fujitsu; Brussel Hoofdstad; On-site; EUR 110,000 - 220,000; Full time

Job summary

Fujitsu Limited in Brussels is seeking a freelance AI Security Engineer to embed security across the AI lifecycle, protect models, data and integrations, and enable responsible AI adoption in security monitoring, threat detection, vulnerability management and secure software development.

You will collaborate with security, cloud, architecture, development and business teams to balance innovation with robust controls while maintaining human oversight.

Qualifications

• Proven experience in cybersecurity engineering, cloud/security, IAM, SOC or DevSecOps.
• Solid understanding of security risks with LLMs, AI agents, RAG and AI supply chains.
• Experience conducting security assessments and translating findings into controls.
• Knowledge of AI-specific threats: prompt injection, data leakage, excessive agency and untrusted outputs.
• Ability to implement security measures across AI apps, APIs, clouds, pipelines and prod systems.
• Familiarity with GDPR, EU AI Act, NIS2 and related compliance requirements.
• Excellent communication to both technical and non-technical stakeholders.
• Languages: French, Dutch and English (mandatory).

Responsibilities

• Conduct threat modelling, risk assessments and security reviews for Generative AI, ML and agentic AI solutions.
• Design and implement security guardrails covering IAM, least privilege, secrets, network isolation, data protection, prompt security, tool access, output validation, logging and monitoring.
• Test AI-specific attack scenarios including prompt injection, data exfiltration, excessive permissions, untrusted outputs and misuse of AI tools or agents.
• Integrate security requirements into sandbox environments, AI gateways, pipelines, model management, dependency mgmt and production platforms.
• Contribute to security monitoring and incident response processes for AI components with ownership, audit trails and escalation procedures.
• Assess third-party AI providers, models, libraries and external services, considering supply chain risk.
• Translate findings into actionable mitigation measures and practical recommendations.
• Collaborate with security, cloud, architecture, development and business teams to enable secure AI adoption.

Skills

Cybersecurity Eng

AI Security

Threat Modelling

AI Attack Testing

Security Architecture

Monitoring & IR

Regulatory Compliance

Communication

Languages: FR/NL/EN

Analytical Thinking

Job description

Freelance Assignment: AI Security Engineer

• Position: AI Security Engineer
• Contract Type: Freelance Assignment
• Start Date: 14 December 2027
• Languages: French, Dutch and English - mandatory

Assignment Overview

We are looking for an experienced AI Security Engineer for a freelance assignment in Brussels.

The successful candidate will be responsible for embedding security throughout the AI lifecycle, protecting AI solutions, models, agents, data and integrations. The role also involves enabling the secure and responsible use of AI for security monitoring, threat detection, vulnerability management, patch prioritisation and secure software development.

The assignment requires a pragmatic security professional who can balance innovation with robust security controls, while ensuring that human oversight and accountability remain central to AI adoption.

Key Responsibilities

• Conduct threat modelling, risk assessments and security reviews for Generative AI, Machine Learning and agentic AI solutions.
• Design and implement security guardrails covering identity and access management, least privilege, secrets management, network isolation, data protection, prompt security, tool access, output validation, logging and monitoring.
• Test AI-specific attack scenarios, including prompt injection, data exfiltration, excessive permissions, untrusted outputs and misuse of AI tools or agents.
• Integrate security requirements into sandbox environments, AI gateways, development pipelines, model management, dependency management and production platforms.
• Contribute to the design of security monitoring and incident response processes for AI components, including ownership, audit trails and escalation procedures.
• Assess third-party AI providers, models, libraries and external AI services, taking supply chain risks into account.
• Translate technical security findings into actionable mitigation measures and practical recommendations.
• Collaborate with security, cloud, architecture, development and business teams to support secure AI adoption.

Must-Have Skills and Experience

Candidates must demonstrate the following qualifications:

• Cybersecurity Engineering: Proven experience in cybersecurity engineering, cloud security, application security, Identity and Access Management (IAM), Security Operations (SOC) or DevSecOps.
• AI Security: Solid understanding of security risks associated with Large Language Models (LLMs), AI agents, Retrieval-Augmented Generation (RAG) systems and AI model/data supply chains.
• Threat Modelling and Risk Assessment: Practical experience conducting security assessments, identifying vulnerabilities and translating findings into implementable security controls.
• AI Attack Testing: Understanding of AI-specific threats, including prompt injection, data leakage, excessive agency, insecure tool usage and untrusted model outputs.
• Security Architecture and Controls: Ability to define and implement security measures across AI applications, APIs, cloud environments, development pipelines and production systems.
• Security Monitoring and Incident Response: Understanding of logging, monitoring, auditability and incident response requirements for AI-enabled solutions.
• Regulatory and Compliance Knowledge: Knowledge of GDPR, the EU AI Act, NIS2 or comparable security and regulatory frameworks.
• Communication Skills: Ability to explain complex technical security concepts clearly to both technical and non-technical stakeholders.
• Languages: Professional working proficiency in French, Dutch and English. All three languages are mandatory.
• Analytical and Problem-Solving Skills: Ability to assess complex technical challenges and develop pragmatic, risk-based security solutions.

Nice-to-Have Skills

The following qualifications are considered an advantage:

• Experience in the public sector, G-Cloud environments or institutions related to Belgian social security.
• Experience embedding security controls into software development processes and cloud platforms.
• Experience advising stakeholders, structuring technical information and presenting security risks and recommendations.
• Ability to facilitate multidisciplinary decision-making involving IT, business, security and architecture teams.
• Strong delivery focus, with the ability to meet deadlines and maintain high-quality standards.
• Interest in emerging AI technologies, security innovation and continuous experimentation.
• Experience promoting responsible AI adoption while maintaining appropriate human oversight.
• AI threat models and security risk assessments.
• Recommendations for AI security architecture and technical controls.
• Security testing results and prioritised remediation plans.
• Security requirements for AI development, deployment and operational environments.
• Recommendations for AI security monitoring, auditability and incident response.
• Assessments of third-party AI services and supply chain risks.

Candidate Profile

The ideal candidate is a hands-on security professional with a strong cybersecurity foundation and a good understanding of emerging AI security risks. The candidate can work independently in a freelance environment, engage effectively with multidisciplinary teams and deliver practical security solutions that enable innovation without compromising security.

Important: French, Dutch and English are mandatory requirements for this assignment.