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BSG Team

Who Are We

Berezha Security Group is a cybersecurity firm focused on application security, penetration testing, information security consulting, and professional training.

Our Story

Our story began in 2014 when three prominent Ukrainian cybersecurity professionals have founded Berezha Security. Since then, our company has delivered over 200 projects to more than 100 clients worldwide. We have customers in all major business sectors, including IT services, software products, banking, fintech, retail, healthcare, media, gaming, consulting services, legal and advisory, and many more. Review our public references on Clutch to get a better view of our clients.

Using our offensive mindset and experience, we help our customers develop a mindful approach to cybersecurity and integrate security principles into all aspects of their business.

Our story

We empower our clients to defeat tomorrow’s cybersecurity threats – today.

Our Certificates

Our contribution

  • We foster the cybersecurity development by supporting professional events.
  • We are at the core of OWASP Kyiv, OWASP Ukraine, and NoNameCon.
  • We speak at IT events and promote cybersecurity across the industries.
  • Bru Con
  • no name con
  • Owasp Ukraine
  • Owasp Kyiv

Our Leadership Team

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.
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.
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.