About Me

Martin Mielke

Penetration Tester, Content Developer & Researcher

I am able to draw on 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.


  • 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)


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

Research Interest

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