About
Tomasz Zysko a.k.a. CrazyRat
Experienced Cyber Security Leader with 25+ years in penetration testing, red teaming, cyber security architecture, and team management. My career began as a Software Engineer, where I quickly advanced to leadership roles driven by strategic thinking, technical expertise, and a passion for motivating teams.
I have demonstrated success across diverse sectors including FinTech, insurance, and the cryptocurrency industry. My experience spans conducting advanced red team operations for organizations with over 150,000 endpoints, executing penetration tests on critical IT/OT infrastructures, and building security teams from the ground up to self-sufficiency. I am adept at both identifying vulnerabilities and driving robust remediation, shaping secure IT environments according to risk and business strategy.
My leadership approach emphasizes knowledge sharing, coaching, and empowering teams to reach their highest potential. I am skilled at collaborating with development and business stakeholders to integrate security best practices and foster a culture of security awareness. In addition to hands-on technical work, I provide vCISO consultancy services, advising organizations on building resilient cybersecurity programs tailored to business needs.
Check out my cybersecurity certification roadmap showing certifications I hold.
My progress in Microsoft/Azure learning is visible on Microsoft Learn.
See how I'm doing at KC7, Hack The Box and PentesterLab.