Penetration Tester

Brussels, Brussels-Capital Region

  Security - Penetration Testing


Job Title: Penetration Tester
Duration: 7 months
Location: Hybrid (Onsite 2x days per week in Brussels)
Day Rate: €450-630 p/d

As a Pen tester/Red Teamer, is needed to join a growing business Cyber Security team in Brussels. They will contribute to proactive security testing, vulnerability assessment, and simulating real-world cyber-attacks to identify weaknesses in systems and infrastructure. This contract will run until end of 2024 with a good chance of extension into 2025.


  • Conduct penetration tests against systems, applications, and networks to identify vulnerabilities and weaknesses.

  • Perform both black-box and white-box testing methodologies to simulate real-world attack scenarios.

  • Plan and execute red team operations to assess the organization’s security posture and resilience against advanced cyber threats.

  • Mimic the tactics, techniques, and procedures (TTPs) of real adversaries to identify gaps in defences.

  • Collaborate with other CSIRT members to develop strategies for improving security controls and incident response capabilities.

  • Perform regular vulnerability assessments and security audits to identify and prioritize security risks.

  • Utilize automated scanning tools and manual techniques to discover vulnerabilities in systems, applications, and infrastructure.

  • Provide recommendations for patching, configuration changes, and other remediation efforts.


  • Bachelor’s degree in computer science, Information Security, or a related field, or equivalent experience

  • At least 3-5 years of experience in cybersecurity, with a focus on penetration testing and red teaming.

  • Relevant certifications such as OSCP, OSWE, GPEN, GXPN, or similar are preferred.

  • Strong understanding of network protocols, operating systems, and application security

  • Proficiency in using penetration testing tools such as Metasploit, Burp Suite, Nmap, etc.

  • Experience with red teaming techniques, including social engineering, phishing, and physical security assessments.

  • Familiarity with industry-standard frameworks and methodologies such as MITRE ATT&CK, OWASP, etc.

  • Knowledge of scripting languages (Python, PowerShell, Bash) for automation and tool development

  • Strong written and spoken fluency in English; additional fluency in Dutch and/or French is a plus.

If you are based in Belgium, have relevant Pen Testing experience, and do not require sponsorship to trade as a contractor – then please share an updated CV so we can discuss this vacancy further.


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