Cybersecurity professional with 2+ years of enterprise security operations experience at AstraZeneca. Skilled in Microsoft Sentinel, Defender, Entra ID, threat detection, and incident response across EMEA and APAC regions.
TS
Open to Work
Available for Opportunities
Experience Timeline
NOV 2023 – NOV 2024
Associate Engineer (Collaboration Security)
AstraZeneca · Chennai, India
Led incident response, triaged alerts in Microsoft Sentinel, Defender, and Azure Security Center across EMEA & APAC. Managed email security with Defender for Office 365 and Mimecast. Enforced identity controls via Entra ID and automated workflows using PowerShell.
OCT 2022 – OCT 2023
Junior Engineer (Collaboration Security)
AstraZeneca · Chennai, India
Supported M365 security operations, identity governance, and compliance with Purview. Managed incidents through ServiceNow ensuring SLA-compliant resolution.
2+
Years Experience
1000+
Alerts Investigated
20+
Incidents Handled
10+
CTF Challenges Solved
About Me
Cybersecurity professional with over 2 years of enterprise security operations experience within a regulated global environment at AstraZeneca. Hands-on expertise in security alert triage, incident response, identity and access management, email security, and cloud threat detection across EMEA and APAC regions.
Currently pursuing an MSc in Cybersecurity Risk Management at the University of Galway alongside the SC-200 Microsoft Security Operations Analyst certification. Actively developing detection engineering and offensive security awareness through CTF competitions (CompSoc, University of Galway) and TryHackMe (Voyager Level 6). Available for shift-based SOC work including nights and weekends.
Galway, Ireland
+353 083 328 1863
thulashini.selvan@gmail.com
MSc Cybersecurity Risk Management — University of Galway (2025–2026)
BCA Gold Medalist — B.S. Abdur Rahman Crescent Institute (2019–2022)
· Monitored and triaged security alerts across Microsoft Defender, Microsoft Sentinel (SIEM) and Azure Security Center across EMEA and APAC.
· Led end-to-end incident response for high-severity P2 security incidents including containment, remediation, recovery and post-incident reports.
· Managed Defender for Office 365 and Mimecast email security — phishing analysis, malicious URL investigation and IOC enrichment via VirusTotal and URLscan.io.
· Enforced Entra ID Conditional Access and MFA policies, reducing unauthorised access risk.
· Automated security and administrative workflows using PowerShell, reducing manual effort and improving operational response efficiency.
OCT 2022 – OCT 2023
Junior Engineer (Collaboration Security)
AstraZeneca · Chennai, India
· Supported M365 security operations including access reviews, mailbox security, retention policies and anti-phishing controls in Exchange Online.
· Assisted in identity governance and user provisioning in Microsoft Entra ID, upholding least-privilege principles.
· Implemented Microsoft Purview compliance and auditing controls to identify data exposure risks and strengthen data governance.
· Managed security incidents and service requests through ServiceNow, ensuring timely investigation and SLA-compliant resolution.
Education
MSc in Cybersecurity Risk Management
University of Galway
Sep 2025 – May 2026 · Expected 2:1
Key modules: Cybersecurity Risk Management, Cloud Computing, Information Systems Management, Applied Analytics. Project: MITRE ATT&CK framework and threat intelligence for detection and incident response in regulated healthcare environments.
BCA in Cloud Technology and Information Security
B.S. Abdur Rahman Crescent Institute of Science & Technology
Jul 2019 – May 2022 · First Class with Distinction — Gold Medalist 🥇
Key modules: Information Security, Cloud Security, Computer Networks, Computer Forensics & Investigation, IT Governance. Project: Digital Receptionist System using ReactJS and Flask/Python.
Skills & Tools
SIEM & Detection
Microsoft Sentinel
KQL
Azure Security Center
Alert Triage
Endpoint & Email Security
Microsoft Defender
Defender for Office 365
Mimecast
Phishing Analysis
Identity & Access Management
Microsoft Entra ID
Conditional Access
MFA
Identity Governance
Threat Intelligence
VirusTotal
URLscan.io
MITRE ATT&CK
Google Threat Intelligence
Scripting & Automation
PowerShell
Bash
Python
C++ (DSA)
Compliance & GRC
Microsoft Purview
GDPR
NIST CSF
NIS2
OWASP Top 10
ITSM & Platforms
ServiceNow
Exchange Online
SharePoint Online
Projects & Labs
MITRE ATT&CK Detection Project
Applied MITRE ATT&CK framework and threat intelligence techniques to improve detection and incident response in regulated healthcare environments, aligned with NIST CSF, GDPR and NIS2.
MITRE · NIST · NIS2 · Healthcare
IOC Automation Scripting
Developed Python scripts for log analysis and IOC automation to accelerate threat detection workflows and reduce manual triage effort in SOC operations.
Python · Automation · SOC
Cloud IAM Hardening
Configured Microsoft Entra ID Conditional Access and MFA policies following least-privilege principles across enterprise-scale Azure environments.
Entra ID · IAM · Azure
Digital Receptionist System
Built with ReactJS and Flask/Python as part of a team of three. Automated visitor registration and check-out, improving accuracy, security and guest experience.
ReactJS · Python · Flask
Certifications
Microsoft
SC-200: Microsoft Security Operations Analyst
Microsoft
In Progress
Azure Fundamentals AZ-900
Microsoft
Feb 2026
Earned
Azure AI Fundamentals AI-900
Microsoft
Sep 2021
Earned
AWS & Cloud
AWS Certified AI Practitioner
Amazon Web Services
May 2025
Earned
AWS Cloud Practitioner CLF-C02
Amazon Web Services
Feb 2026
Earned
Security & Compliance
Google Cybersecurity Certificate
Google
In Progress
Google Threat Intelligence Skill Boost
Google
May 2026
Earned
Proofpoint AI Email Security Specialist
Proofpoint
Apr 2026
Earned
GDPR
University of Galway
Dec 2025
Earned
EU AI Act Fundamentals
EU
Nov 2025
Earned
Responsible AI Foundation
Various
Nov 2025
Earned
CTF Writeups & Blog
CTF — Web Exploitation Writeup (CompSoc, UoG)
WEB · EXPLOITATION · CRYPTOGRAPHY · 2026
TryHackMe — SOC Alert Triage Path Notes
SOC · SIEM · LOG ANALYSIS · TRYHACKME
BSides Galway 2026 — Key Takeaways
COMMUNITY · THREAT INTEL · NETWORKING · 2026
Cloud Threat Detection with Microsoft Sentinel
AZURE · SENTINEL · KQL · DETECTION ENGINEERING
My Journey from AstraZeneca to MSc Cybersecurity
CAREER · PERSONAL · IRELAND · 2026
Achievements & Profiles
TryHackMe
Voyager Level 6 thulaX05
Credly
thulashini-selvan Multiple badges
GitHub
Thulash Pull Shark 🦈
Gold Medalist
BCA — First Class with Distinction
BSides Galway
2026 Attendee Irish Security Community
Volunteer
National Breast Cancer Research Institute
Contact
thulashini.selvan@gmail.com
Galway, Ireland
Available for shift-based SOC work including nights & weekends