---
title: "Sebin Thomas - Consultant - Cyber & IT Risk in Kozhikode | Tal"
description: "Meet Sebin Thomas, Penetration Tester | Web, Active Directory & Cloud Security | CRTE | CRTO | PNPT | 5x CVEs based in Kozhikode. AI stack includes antigravity and codex."
image: "https://tal.club/meet/sebin-thomas/share-image"
---

# Sebin Thomas on Tal

## Headline

Penetration Tester \| Web, Active Directory & Cloud Security \| CRTE \| CRTO \| PNPT \| 5x CVEs

## About

Cybersecurity Consultant \| Pentester \| Red Teamer Key Expertise: • Active Directory Security • Red Teaming & Adversary Simulation • Phishing & Social Engineering Campaigns • Web Application & API Security Testing • Internal, Network & Infrastructure Penetration Testing • Cloud Security \(AWS, Azure, GCP\) & Cloud Attack Simulation • Windows Hardening & Defense Evasion • Security\-Focused Code Review • ATM & Kiosk Security Assessments Certifications: PNPT \| CRTE \| CRTO \| CAD\-PENx \| CEH \| Cloud Security Certifications Highlights: • Reported 5 CVEs impacting real\-world technologies • 5\+ years of CTF experience, consistently solving advanced challenges • Delivered impactful VAPT & Red Team engagements across enterprise and cloud environments • Experienced in multi\-cloud compromise scenarios \(AWS, Azure, GCP, hybrid AD environments\)

## Location

Kozhikode

## AI stack

antigravity

codex

## Work experience

Consultant \- Cyber & IT Risk at Grant Thornton Bharat LLP, Mar 2025 \- Present · 1 yr 6 mos, Kochi, Kerala, India, • Conducted Red Team and VAPT engagements for leading banks in India\. • Identified critical vulnerabilities in APIs, web apps, AD, internal and external infrastructures\. • Performed OSINT and attack surface analysis for client environments\. • Executed ATM and kiosk security testing, dumpster diving, and physical intrusion attempts\. • Delivered clear and detailed reports with exploitation steps and remediation guidance\.

CTF player at TamilCTF, Sep 2021 \- Present · 5 yrs

CTF Player at Hack The Box, Jan 2019 \- Present · 7 yrs 8 mos

Cyber Security Specialist at Cyber Heals, Dec 2023 \- Feb 2025 · 1 yr 3 mos, Chennai, Tamil Nadu, India

Security Researcher at Zerocopter, Feb 2023 \- May 2023 · 4 mos, Remote

## Education

Bachelor of Computer Application, Computer science, Alva's College of Education

[View the original profile](https://tal.club/meet/sebin-thomas)

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