Serhii Nesterenko is a Cybersecurity Consultant, Ethical Hacker (Penetration Tester), Security Educator, and Psychological Profiler. With over 20 years of hands-on experience across multiple security domains, his expertise spans investigations, counter-fraud, OSINT, and risk assessment, with a dedicated focus on the cybersecurity field since 2012.

Serhii’s professional background includes working for world-renowned top-tier companies such as Comodo and Deutsche Bank. This high-level corporate exposure has enriched his teaching with unique, real-world experience, making his practical training highly sought after by students worldwide.

As an established thought leader, Serhii is the author of numerous publications on security, counter-fraud, intelligence and counter-cyberespionage. He has also authored a definitive guide on counter-fraud techniques and defending against dark psychology.

He is the creator of several bestselling video courses, including:

The Secrets of OSINT: Become the James Bond of the Internet and find out everything about anyone.

The Dark Art of Social Engineering and HUMINT: Find out how scammers, hackers, and spies steal your secrets—and how to stop them.

Cybersecurity Attacks (Red Team Activity) & Cybersecurity: Methods of Protection (Blue Team Activity): Published globally by Packt Publishing.

Driven by a genuine passion for education, Serhii loves sharing actionable knowledge that empowers individuals and organizations to make the digital world a safer and more secure place.

? In the Media

"Serhii is a cybersecurity consultant and penetration tester with rich experience in the information security field. He has consulted for international corporations, military staff, NGOs, politicians, members of Parliament, law enforcement, and VIPs on high-stakes security issues. His deep knowledge of information technology combined with human psychology enables him to design highly effective strategies to prevent and overcome even the most cunning cyberattacks."

“Social engineering attacks: how to defend against them and how to fight back”, "Techgenix", May 30, 2018