Penetration Tester

Job Description Medior / Senior Penetration Tester
Location: Belgium, Brussels

Key Responsibilities
Offensive Security & Penetration Testing
Perform penetration tests on network, infrastructure, and application environments (external, internal, remote access).
Conduct targeted attacks and adversarial simulations , including OSINT, spear phishing, and red team techniques.
Identify vulnerabilities, assess risk levels, and validate real-world exploitability.
Produce high-quality technical and executive reports with clear, actionable remediation recommendations.
Provide strategic security guidance tailored to clients’ maturity levels and operational constraints.
Collaboration & Knowledge Sharing
Mentor and support junior penetration testers, sharing offensive techniques and best practices.
Contribute to the evolution of ’ offensive security methodologies, tools, and frameworks .
Collaborate with internal and external cybersecurity stakeholders to clearly communicate findings and improve overall security posture.
Continuous Learning & Research
Stay up to date with emerging attack vectors, vulnerabilities, and exploitation techniques .
Participate in internal research, development, and training initiatives to enhance offensive capabilities.
Contribute to the cybersecurity community through responsible disclosure, research, and knowledge sharing .

Qualifications & Skills
Minimum 2 years of experience in penetration testing, red teaming, or offensive security.
Strong understanding of operating systems, networking, and application-layer security .
Hands-on experience with offensive security tools and frameworks such as:
Burp Suite, Metasploit, Cobalt Strike, Nmap, netexec, BloodHound
Solid scripting skills (e.g. Python, Rust, Bash, PowerShell ).
Excellent analytical, problem-solving, and technical reporting skills.
Ability to communicate complex technical findings clearly to both technical and non-technical audiences.

Certifications (Preferred)
Offensive Security or GIAC certifications, such as:
OSCP, OSEP, OSWP, OSCE, OSED, GPEN , or equivalent
Participation in CTF competitions , FLARE-ON challenges , or SANS training is highly valued.

Languages
English: Professional working proficiency
French or Dutch: Full professional or native proficiency
Proficiency in both French and Dutch is a strong plus