My responsibilities include pentesting, internet perimeter testing, reporting, collaborating with stakeholders and developers, continuous improvement of pentesting methodologies, and comprehensive research to define the scope of pentest for numerous projects. This process significantly enhances my understanding of solution design, Secure SDLC, and cloud security. I also actively participate in incident response to mitigate emerging security issues.

I enhanced the security posture of a leading Vietnamese bank (one of the Big Four) by identifying internal and external security vulnerabilities, improving the pentesting process, and collaborating closely with SOC members to optimize SIEM system rules.

I've worked with numerous global IT teams and big clients, conducting security testing, delivering detailed security reports, and working closely with developers to mitigate identified security vulnerabilities.

I've had the opportunity to learn about and delve into various aspects of cybersecurity here. I've started sharing my knowledge by writing blog posts, organizing CTF events, identifying and reporting public security vulnerabilities, and raising developers' security awareness through sharing sessions.