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