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