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BSG Team

We Are BSG

Our team helps companies today to fight the cybersecurity threats of tomorrow. Meet the BSG superheroes!

All BSG crew members are highly-dedicated cybersecurity enthusiasts and recognized security experts – in Ukraine and abroad. All our mid- and senior-level consultants hold top cybersecurity certifications, OSCP, CISSP, CISA, among others. Our expertise in Application Security, Penetration Testing, and Information Security Consulting is proven by tens of completed projects with highly positive customer feedback.

Vlad Styran
Vlad Styran

Co-founder & CEO OSCP, CISSP, CISA

BSG strategist.
Information security expert and community leader.

Vlad Styran
Co-founder & CEO

Vlad Styran is an internationally known infosec expert with 15+ years of experience in penetration testing, information security management, consulting, and audit. He maintains OSCP, CISSP, and CISA certifications and was certified as CEH, ISO 27001 Lead Auditor, and many more throughout his career.

Vlad is a co-founder of the OWASP Kyiv chapter and the NoNameCon information security conference. He is a notable blogger, podcaster, and conference speaker.

At BSG, Vlad is responsible for our growth and customer experience. His involvement helps us to deliver first-rate consulting services in application security, security awareness, and information security strategy.

https://www.linkedin.com/in/styran/
/public/images/team/Vlad-Styran_big.jpg
Andriy Varusha
Andriy Varusha

Co-founder & COO CISSP

BSG services, operations, and quality leader.
IT auditor and cybersecurity consultant.

Andriy Varusha
Co-founder & CSO

Andriy is an accomplished manager with 10+ years of experience in various industry verticals. He has started his IT audit and consulting career and continued in enterprise IT and custom software development services.

Andriy has experience in leading customer relationships within the US, UK, and Western Europe geographies, responsible for distributed teams and permanent engagements of different scales.

Andriy has stood at the root of the Ukrainian cybersecurity professional community and has joined BSG to advance his contribution to the cybersecurity industry's development.
At BSG, Andriy acts the Chief Services Officer and a security consulting practice lead.

https://www.linkedin.com/in/andriyvarusha/
/public/images/team/Andriy-Varusha_big.jpg
Ihor Bliumental
Ihor Bliumental

Security Consultant,
Application Security Lead

Top 20 bug-hunter on BugCrowd.
Co-founder of OWASP Kyiv & NoNameCon.

Ihor Bliumental
Security Consultant, Application Security Lead

Ihor Bliumental is a world-class application security expert and one of the most successful bug-hunters globally. He was named the BugCrowd MVP multiple times and submitted around 150 vulnerabilities within bug bounty programs of global brands such as MasterCard, Netflix, Upwork, Tesla, and others.

At BSG, Ihor leads, plans, and coordinates all our security assessment projects and coaches the teammates on various cybersecurity aspects.

He is a compulsive book reader and a professional intellectual games team captain.

https://www.facebook.com/ihor.bliumental
/public/images/team/Ihor-Bliumental_big.jpg
Serhii Korolenko
Serhii Korolenko

Security Consultant, Training Lead

OSCP, eWPTX, eMAPT

Penetration tester. CFT game master. OWASP Kyiv chapter leader.

Serhii Korolenko
Security Consultant, Training Lead

Serhii is an information security professional with vast experience in Application Security and Penetration Testing. He manages the full spectrum of appsec and pentesting engagements in the BSG portfolio.

As the BSG Training Lead, he is always up to date on the latest security trends and is passionate about organizing conferences and speaking publicly. He presented and volunteered at BruCON, OWASP Ukraine, NoNameCon, and TestingStage, among many others.

Serhii is fond of sports videogames and loves riding the drone and taking footage of his picturesque travels.

https://www.linkedin.com/in/sergiy-korolenko-82b2ab46/
/public/images/team/Serhii-Korolenko_big.jpg
Kyrylo Hobreniak
Kyrylo Hobreniak

Security Consultant OSCP, eWPTX

Penetration tester.
Security trainer.
OWASP Kyiv chapter leader.

Kyrylo Hobreniak
Security Consultant

Kyrylo is a cybersecurity consultant specializing in web and mobile Application Security analysis, wired and wireless network Penetration Testing, and Social Engineering security assessments.

His passion for cybersecurity developed from his dedication to technical disciplines and a superpower of accumulating practical knowledge in astronomical amounts. Kyrylo is a talented trainer, and he contributes to the cybersecurity community by volunteering at OWASP Kyiv, OWASP Ukraine, NoNameCon, and other professional movements.

https://www.linkedin.com/in/kireyn/
/public/images/team/Kyrylo-Hobreniak_big.jpg
Anna Zhmurko
Anna Zhmurko

Security Analyst OSCP, CEH

Penetration Tester

Anna Zhmurko
Security Analyst

Anna is a security professional who focuses on Penetration Testing, web and mobile Application Security, and Social Engineering. She is highly skilled in malware analysis and security code review. Anna is OSCP and CEH certified middle-level security professional.

She is passionate about learning and hangs out and Cybrary and HTB, plays and wins CTF competitions, and solves online challenges.

Anna loves sharing her knowledge with colleagues and customers, she is fond of table games, and she has the most adorable puppy in the world.

https://www.linkedin.com/in/anna-zhmurko/
/public/images/team/Anna-Zhmurko-big.jpg
Roman Hunko
Roman Hunko

Security Analyst

Penetration Tester.
Professional community volunteer.

Roman Hunko
Security Analyst

Roman is a cybersecurity engineer focused on the technical aspects of Penetration Testing, Application Security, and Social Engineering assessments.

Roman is working hard to develop his network pentesting skills and trains for the OSCP course and exam in the Hack The Box playground. Meanwhile, he has started sharing his knowledge with the community as the best way to learn something by trying to teach it.

Roman is a dedicated professional events volunteer and a hobbyist basketball player.

https://www.linkedin.com/in/roma-hunko-2a8900107/
/public/images/team/Roman-Hunko_big.jpg
Roman Rott
Roman Rott

Software Engineer

Application Security enthusiast.
Professional community volunteer.

Roman Rott
Software Engineer

Roman is a full-stack software developer with more than ten years of programming experience who focuses on Web Application Development and Software Security.

At BSG, Roman develops our own software product, the D.A.R.T.S. pentest automation platform, which allows us and our clients to collaborate securely on sensitive pentest-related data. With Roman's help, we streamline our project activities, automate reporting, and integrate external data sources into our workflow.

Roman contributes to the cybersecurity community development by volunteering at NoNameCon and OWASP Ukraine professional events.

https://www.linkedin.com/in/rrott/
/public/images/team/Roman-Rott_big.jpg