About Me

Martin Mielke

Penetration Tester, Content Developer & Researcher

I am able to draw on over ten years’ IT security experience, both as an Offensive Security Expert in the German Armed Forces and as a Senior Consultant in private practice.

I have built a track record of coordinating penetration testing and vulnerability assessments that deliver results for both public and private sector clients. My practical experience is underpinned by a strong and relevant professional education: I am OSCP, OSCE, OSWE, OSEP, CRTO and CISSP qualified, graduated with a First-Class degree in Computer Science and have completed an MSc in Applied IT Security.

When I’m not working, I try to learn new skills, write security tools, create content & participate in various CTF competitions.


  • Offensive Security Exploitation Expert (OSEE)
  • Certified Red Team Operator (CRTO)
  • Offensive Security Experienced Penetration Tester (OSEP)
  • Offensive Security Web Expert (OSWE)
  • Offensive Security Certified Expert (OSCE)
  • Offensive Security Certified Professional (OSCP)
  • Certified Information Systems Security Professional (CISSP)


  • 2022 | Advanced Windows Exploitation @ OffSec
  • 2022 | Malware Development Intermediate @ Sektor7 
  • 2021 | Windows User Mode Exploit Development @ OffSec
  • 2020 | Deep Learning Specialization by Andrew Ng @ Coursera
  • 2019 | SAP Cyber-Security for IT Security Practitioners @ 44Con
  • 2019 | SANS660 – Advanced Penetration Testing, Exploit Writing, and Ethical Hacking
  • 2019 | SANS760 – Advanced Exploit Development for Penetration Testers
  • 2018 | Advanced Software Exploitation @ Ptrace Security
  • 2018 | Vulnerability Discovery and Triage Automation @ OffensiveCon
  • 2015 | Reverse Engineering with IDA Pro @ BlackHat EU
  • 2015 | Windows & Linux Kernel Debugging @ Linux Hotel

Research Interest

On the offensive side of security, I focus on logical bugs, binary analysis, fuzzing, and exploitation on Windows. Besides security, I have a passion for machine learning & distributed systems.