Cyber Defence - Detection Use Case Testing & Adversary Simulation Expert

Location: Brussels

Start Date: ASAP

End Date: 01/02/2026

Role Description:

The Cyber Defence team is responsible for preparing and responding to unauthorized cyber activity. The team provides proactive support and intelligence to secure systems against cyber-attacks and reactive measures triggered by incidents or events. We are looking for an expert to perform the following activities:

Responsibilities:

• Conduct Detection Use Case Testing to ensure Use Cases detect intended actions.
• Identify and simulate adversary actions for missing detections.
• Track vulnerabilities, manage remediation tasks, and collaborate with system owners.
• Work with Teams to test and enhance alert efficacy.
• Execute continuous adversary simulations, threat analysis, and develop threat scenarios.
• Identify and simulate attacks on missing counter-measures.

Language Requirements:

• Dutch: Good spoken (preferable)
• French: Good spoken (mandatory)
• English: Fluent spoken & written (mandatory)

Education:

Bachelor/Master or equivalent by experience.

Required Experience/Knowledge:

• At least 5 years of experience in information security, penetration testing.
• Strong knowledge of IT security technology and processes.
• Experience with security incident management in SOC, CSIRT, or IT environments.
• Experience with security testing of web applications, mobile applications, APIs, and cloud-hosted applications.
• Proficiency with penetration testing tools such as Metasploit, CORE Impact, or Kali Linux.
• Ability to write custom scripts for vulnerability detection.
• Knowledge of MITRE's ATT&CK framework.

Preferable Skills:

• Familiarity with IDS/IPS, NetFlow, and protocol analysis tools.
• Experience with log aggregation, SIEM solutions, and digital analytics platforms.
• Proficiency in programming and scripting languages like Perl, Ruby, and Python.
• Knowledge of Web Application Security Development (OWASP).
• Understanding of cryptography algorithms and protocols.

Soft Skills:

• Passion for Cyber Security.
• Team player with a proactive attitude.
• Strong communication and client-facing skills.
• Excellent analytical skills and attention to detail.
• Ability to work autonomously and commit to continuous improvement.