About Me

With 14 years of hands-on experience in offensive security and over 300 successful projects, I bring deep expertise in protecting organizations of all sizes. Prior to specializing in offensive security, I spent 7 years in IT consulting focused on secure infrastructure projects, which provided a strong foundation for understanding complex IT environments. My work as an ethical hacker has ranged from securing large enterprises, including DAX-listed companies and Fortune Global 500 firms, to meeting the unique needs of small businesses.

Independent Expertise with Global Reach

While I primarily work directly with clients, I have also partnered with renowned IT security firms on select high-profile projects. These collaborations, whether as a direct partner or subcontractor, have allowed me to contribute to projects requiring specialized skills and teamwork. Regardless of the project, my commitment remains the same: providing reliable, tailored security services that meet your specific needs. Throughout my career, I have supported clients globally, including Europe, India, Africa, and Japan, helping them safeguard their assets and maintain operational peace of mind.

Industry Experience

I have worked across various sectors, including Finance, Telecommunications, Logistics, Insurance, Energy, Health, and Retail. This diverse experience has given me the ability to tackle industry-specific threats and tailor security strategies to each environment.

What I Do

Red Team Assessments / Attack Simulations
  • Over 13 years of experience conducting red team assessments.
  • Apply ethical hacking techniques to simulate real-world attacks in large network environments with more than 100,000 users.
  • Significant experience in high-stakes sectors like finance and energy.
  • Well-versed in aligning strategies with frameworks like TIBER-EU when required.
Penetration Testing
  • 14+ years of experience in penetration testing for Web/Mobile Applications, Networks, and Cloud environments.
  • Completed over 300 projects, known for delivering thorough and effective testing that strengthens security measures.
Incident Response
  • Skilled in managing large-scale Active Directory compromises and coordinating responses across multiple organizations, impacting over 200,000 users.
  • My expertise as an ethical hacker extends to analyzing and mitigating web application compromises as swiftly and effectively as possible.

Education and Certifications

I hold a degree in IT Security from Ruhr-University Bochum (Dipl.-Ing.) and have earned certifications that validate my skills, including:
  • Offensive Security Certified Professional (OSCP)
  • Certified Information Systems Security Professional (CISSP)

My Commitment

My mission is to provide top-quality security testing and consultancy, helping organizations—both large and small—improve their cybersecurity with confidence.

Thank you for considering me for your security needs. If you have any questions or need more information, please feel free to reach out.

Sincerely,
Rene Feldhoff
Founder & Lead Security Consultant