Mário Leitão-Teixeira
Portugal
Summary
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SeniorMário Teixeira is a Security Analyst Team Leader with nine years of hands-on experience in application security, pentesting, and vulnerability research, currently leading a team at Checkmarx. He has progressed through multiple roles at Checkmarx—from analyst to team leader—focusing on analyzing open-source vulnerabilities across languages, tooling, and disclosure of 0-days. Comfortable both in research and operational settings, he builds internal automation, performs code reviews, and guides remediation for large enterprise customers. Outside of corporate work he contributes to PentesterLab and GitHub projects, and brings discipline from his background as a Krav Maga instructor to mentoring and incident response. Based in the Greater Braga Area, Portugal, he combines a practical engineering degree with a curiosity-driven approach to AppSec that balances offensive research and scalable, developer-friendly defenses.
9 years of coding experience
Github Skills (5)
targets7
methodology7
network-tools7
implant7
infosec5
Programming languages (2)
Github contributions (5)
mjalt96/Manyloris
Mar 2022 - Nov 2022
Run Slowloris against multiple targets.
Contributions:18 commits, 2 PRs, 16 pushes in 8 months
network-toolsmultiple-targetsmethodologyinfosecimplant
mjalt96/SharpLocker
Sep 2020 - Oct 2020
Contributions:6 commits, 4 pushes in 9 days
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