MASTER
CYBERSECURITY
SPECIALIST
How can I help in securing your assets?
Cybersecurity
Reliable protection of your computers, personal gadgets, and networks on the every threat level – from technical to human. Providing your confidentiality on the Internet.
Verification of information
Checking your business partners and competitors with two-factor technique of information-psychological analysis. Assessment of information credibility.
Risk assessment and threat modeling
Acute and high-qualified assessment of your systems’ vulnerabilities on the technical and human level and elaborating strong methods of protection.
Reputation protection
Recovering reputation after information attacks and negative media campaigns. Preventive creation of bulletproof reputation to resist such attacks. Working with public opinion.
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Testimonials
Sergii has a wonderful mix of talent — both on the tech side and in communications. I very much enjoyed working with Sergii at Comodo. Companies today need his blend of capabilities, although many of them still do not know it. Sergii acted as a mediator between narrow technical specialists and our technically non-educated audience, giving Comodo a great boost in visibility, in blogs, presentations, articles, and quarterly reports that covered a wide range of malware and cybersecurity issues.
Sergii is an excellent technical content writer and presenter. His training videos are clear and presented with patience and willingness to show and help beginners and professionals on their way through difficult Cybersecurity topics.
Sergii Nesterenko has a rare combination of deep knowledge and hands-on experience in various cybersecurity domains and strong influential writing. This special feature is high-demanded nowadays when educating cybersecurity topics and promoting cybersecurity products have become a priority task. His mastery in turning technical cybersecurity topics in engaging articles, blog entries and other kinds of influential writing have enabled effective informing wide audience about Comodo’s team achievements in its struggle against cybercrimes. Sergii’s ability to transform hard-to-understand cybersecurity topics into capturing stories for the wide audience is a wonderful way to deliver value information and win the hearts and minds of the customers.
Add here excellent communication skills to work effectively in the multinational command -- and you’ll understand why I’m sure that Sergii will add a great value to any company that invites him onboard.
It was quite a pleasure for me to work with Sergii A. Nesterenko. As I was responsible for development management of Anti-Spam Lab team, we were contributing to come up with blockbuster blogs and articles to help the world of IT fight against unwanted emails and similar cyber attacks. Sergii is quite professional in gathering requirements, clearing unnecessary artifacts to deliver cutting-edge technical content in the most elegant way in a timely manner. I am sure he will bring success to every bit of work he involves in.
It's been a pleasure working together with Sergii A. Nesterenko as an author for 2 courses on CyberSecurity. He has cutting edge knowledge on Cybersecurity. He is ready to deal with difficult situations and solve the problems on time and take care of the project. He was open to feedback and was capable of adapting to new working environments. Very Positive attitude towards work. Our collaboration on the course has been a real joy for me and Packt. Would love to work with him again in future and create stellar video courses on cybersecurity.
In the realm of cybersecurity, Sergii stands out as a true professional. His adept handling of project management tools and methodologies has been commendable.
His leadership shone through in his ability to foster collaboration and ensure alignment among stakeholders. Sergii is not just a skilled communicator but also a dedicated professional with a hands-on approach.
With a knack for adapting to complex scenarios, Sergii has shown he can rise to any cybersecurity challenge.
Security highlights
that definitely will assist you
Penetration Testing
Why Do You Need a Penetration Test? Penetration testing is the most precise and reliable tool to get the real picture of your digital assets’ protection. You can successfully elaborate all your security policies, implement procedures, pass through the information […]
«Kyivstar» under a whopping cyberattack: How the attackers managed to sneak so deeply into the systems of the largest Ukrainian mobile operator?
No doubt, the new unprecedentedly devastating cyberattack on the biggest Ukrainian mobile operator Kyivstar will become the hottest topic in the cybersecurity domain. From my point of view, based on the current (very stingy) info, we could assume the following […]
Data Security
All your assets are digital data. Just a set of ones and zeros storing on hard drives of personal computers, companies endpoints or in clouds. Unfortunately, they can be destroyed and lost forever at any moment if you have not […]
Digital Forensics
It happens every day to thousands of companies. Data breach, cyber espionage, ransomware, trojans, viruses, worms, insider leakages, whistleblowing – in other words, a kind of attack that brings devastating damage to a company. Those sad cases when bad guys […]
My video courses
The Art of Social Engineering and HUMINT
Find out how spies and hackers steal your secrets – and how to stop them
This course is unique. Because unlike many courses on Social Engineering existing on the market, it’s not about technical tools and software. It’s about the essence of Social Engineering: people’s psychology. It’s not about the vulnerabilities of a computer. It’s about vulnerabilities of the human brain – how it can be attacked and how to protect it. And this is the only course discovering hidden connection between social engineers and spies. I’ll also teach you a special part of social engineering — …
The Secrets of OSINT
Become James Bond of the Internet and find out everything about anyone
Information is the king today. If you have it, you’ll be able to make the right decisions and win. If not, you will be taken advantage of and lose. It relates to any area of your life – business, work, family, relationship and, especially, security. Wouldn’t it be dreamy if you were able to get the truth about your business partners? Spot scammers before they have ripped you off? Locate a bully that pursues you or your child in social media? Find a criminal? Be sure a person you speak with does not lie to you? Get the darkest secrets of a company…
Cybersecurity Attacks (Red Team Activity)
Learn about the different kinds of cyber attacks and how they can be executed
There is only way to become really good at cybersecurity: you must know both how to attack and how to defend. First of all, you have to learn to think like a hacker, so you deeply understand what the threats are. Then you’ll need to know how to protect yourself from the attacks. We start with precise descriptions and examples of network attacks to show you how the malicious hackers can break into your network—and what harm they can do. Then we’ll look at another attack vector: websites and web-applications. You’ll see the most vulnerable places and understand what cybercriminals will do if they find them. Then we’ll discover the third vector of attacks: humans…
HOT NEWS
The Hacker News
- Microsoft Warns of Tax-Themed Email Attacks Using PDFs and QR Codes to Deliver Malware 03.04.2025Microsoft is warning of several phishing campaigns that are leveraging tax-related themes to deploy malware and steal credentials. "These campaigns notably use redirection methods such as URL shorteners and QR codes contained in malicious attachments and abuse legitimate services like file-hosting services and business profile pages to avoid detection," Microsoft said in a report shared […]
- Lazarus Group Targets Job Seekers With ClickFix Tactic to Deploy GolangGhost Malware 03.04.2025The North Korean threat actors behind Contagious Interview have adopted the increasingly popular ClickFix social engineering tactic to lure job seekers in the cryptocurrency sector to deliver a previously undocumented Go-based backdoor called GolangGhost on Windows and macOS systems. The new activity, assessed to be a continuation of the campaign, has been codenamed ClickFake Interview […]
- AI Threats Are Evolving Fast — Learn Practical Defense Tactics in this Expert Webinar 03.04.2025The rules have changed. Again. Artificial intelligence is bringing powerful new tools to businesses. But it's also giving cybercriminals smarter ways to attack. They’re moving quicker, targeting more precisely, and slipping past old defenses without being noticed. And here's the harsh truth: If your security strategy hasn’t evolved with AI in mind, you’re already behind. […]
Sophos News
- It takes two: The 2025 Sophos Active Adversary Report 02.04.2025The dawn of our fifth year deepens our understanding of the enemies at the gate, and some tensions inside it; plus, an anniversary gift from us to youAngela Gunn
- Qilin affiliates spear-phish MSP ScreenConnect admin, targeting customers downstream 01.04.2025Attack matches three-year long pattern of ScreenConnect attacks tracked by Sophos MDR as STAC4365.gallagherseanm
- Stealing user credentials with evilginx 28.03.2025A malevolent mutation of the widely used nginx web server facilitates Adversary-in-the-Middle action, but there’s hopeAngela Gunn
- Sophos ranked #1 overall for Firewall, MDR, and EDR in the G2 Spring 2025 Reports 27.03.2025Also ranked the top solution across 53 global reports.Editor