Senior Pen Tester
Date: Dec 23, 2025
Location: Olen, BE, 2250
Company: Belden, Inc
Belong. Believe. Be You. Belden.
Propel your career surrounded by a diverse team of innovative, goal-oriented individuals who are pursuing the next generation of connectivity solutions. At Belden, you’ll participate in work that will challenge you and position you to excel. You’ll collaborate with colleagues from around the world, gaining exposure to a broad base of expertise and perspectives.
Together, we’ll continue on a journey of innovation, creating a connected world and paving the way for automation. Join us and let’s build the future.
SR Penetration Tester
A senior penetration tester's main responsibility is to execute highly complex and specialized penetration tests. He is a specialist in cyber security topics in IT and OT. He has the expertise to design and carry out advanced assessments, often acting as a key technical resource for the team.
Key Responsibilities
- Executing Advanced Penetration Tests: He has the expertise to conduct in-depth security assessments on complex systems, including web applications, cloud environments, networks, and mobile applications. This often involves going beyond automated tools to perform manual testing and creative exploitation.
- Developing Custom Tools and Exploits: Out of his experience, he is capable to develop own scripts and exploits to bypass sophisticated security controls and find zero-day vulnerabilities.
- Technical Mentorship: Guiding and mentoring junior and mid-level testers is one of the major skills. Which includes developing technical skills, understanding complex methodologies, as well as improve reporting.
- Reporting and Communication: He is responsible for writing detailed technical reports that clearly outline vulnerabilities, their potential impact, and actionable recommendations for remediation. Communicating these findings effectively to both technical and non-technical stakeholders is indispensable.
- Staying Current: A core responsibility is to continuously research new threats, attack vectors, and security technologies.
Qualifications
- Experience:
5+ years of hands-on experience in penetration testing, red teaming, or a related offensive security role. - Certifications:
Relevant industry certifications such as Offensive Security Certified Professional (OSCP), Certified Ethical Hacker (CEH), or GIAC certifications (e.g., GPEN, GWAPT). - Technical Skills:
Programming/Scripting: Proficiency in at least one scripting language (e.g., Python, Ruby, PowerShell) for automating tasks and developing custom tools.
Operating Systems: Deep knowledge of Windows and Linux/Unix operating systems.
Networking: Strong understanding of TCP/IP, network protocols, and common network services.
Web Technologies: Extensive experience with common web vulnerabilities (e.g., OWASP Top 10) and familiarity with various web application frameworks.
Cloud Security: Experience with penetration testing in at least one major cloud provider (e.g., AWS, Azure).
AI: experience in penetration testing AI implementations would be desirable.
- Soft Skills:
Excellent written and verbal communication skills.
Strong problem-solving and analytical abilities.
Ability to work independently and as part of a team.
A passion for continuous learning and staying updated on the latest cybersecurity threats and trends.
Education
- Bachelor's degree in Computer Science, Information Technology, Cybersecurity, or a related field, or equivalent practical experience.
Let’s Write the Next 100 Years Together.
Join a global community striving to improve connectivity and security. The work we’re doing puts our people on the front lines of impacting lives and shaping the future. Propel your story of innovation by helping Belden write the next chapter in ours. Shape your future at Belden.
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These statements are intended to describe the general nature and level of work involved for this job. It is not an exhaustive list of all responsibilities, duties and skills required of this job.