Selim Dursun
Security Engineer · Penetration Testing & Red Teaming
About
Seasoned cybersecurity professional with international experience specializing in penetration testing, red teaming, security assessments, and SOC activities. OSCP certified with a background in digital forensics, adept at navigating complex cybersecurity challenges across technical, governance, and human dimensions. Known for clear communication and a collaborative approach, excelling in cross-functional team environments while actively sharing knowledge both internally and externally.
Experience
Cybersecurity Consultant
BDO Advisory B.V.
2020 - Present
- Execute penetration tests across web applications, APIs, cloud environments (Azure, AWS), and internal networks for organizations in finance, government, and retail.
- Lead red team engagements including phishing, physical intrusion, and assumed breach scenarios, translating technical findings into clear risk narratives for senior stakeholders.
- Manage client relationships and contribute to business development for penetration testing, SOC activities, and security assessments.
- Mentor junior consultants and interns, guiding graduation internships and supporting their development toward independent delivery of security assessments.
- Deliver internal and external presentations on offensive security topics, sharing lessons learned and practical best practices with peers and clients.
Teaching Assistant
University of Applied Sciences Leiden
2019 - 2020
- Delivered hands-on ethical hacking workshops to students in the Digital Forensics specialization, covering core offensive security concepts and tooling.
- Promoted the Digital Forensics specialization during open days and acted as a point of contact for prospective students interested in cybersecurity.
Certifications
Responsible Disclosures
Identified and responsibly reported critical and high-impact vulnerabilities to organizations across government, automotive, retail, and energy sectors, including:
Government of the Netherlands Ferrari Ahold Delhaize Gemeente Amsterdam Royal FloraHolland Pon Bol Achmea Logicx Channable University of Washington Motio PostNL Vattenfall
Skills
Penetration Testing Red Teaming Security Assessments Web Application Security Infrastructure Security Cloud Security (Azure, AWS) Social Engineering Exploit Development Post-Exploitation Physical Security Testing ICS/OT Security Digital Forensics OSINT SOC Operations Vulnerability Assessment