Associate Engineer (Collaboration Security)
AstraZeneca, Chennai, India
TS.
Cybersecurity Professional
Thulashini Selvan
Security Operations Analyst | Incident Response | Threat Hunting
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 WorkAvailable for SOC roles
Experience Timeline
Junior Engineer (Collaboration Security)
AstraZeneca, Chennai, India
Led incident response, triaged alerts in Microsoft Sentinel, Defender, and Azure Security Center across EMEA & APAC regions. Managed email security with Defender for Office 365 and Mimecast. Enforced identity controls via Entra ID and automated workflows using PowerShell.
Supported Microsoft 365 security operations, identity governance, compliance with Purview, and managed incidents through ServiceNow ensuring SLA-compliant resolution.
2+Years Experience
1000+Alerts Investigated
20+Incidents Handled
10+CTF Challenges Solved
About
I focus on security operations, incident response, cloud threat detection, identity security, and practical detection engineering.
Skills
Microsoft SentinelKQLMicrosoft DefenderEntra ID
MimecastPowerShellPythonMITRE ATT&CK
Projects
Microsoft Sentinel Detection Lab
KQL detections and MITRE ATT&CK mapping.
Phishing Email Analysis
Header review, URL investigation, IOC enrichment.
PowerShell IOC Automation
Security workflow automation and enrichment.
Certifications
SC-200 in progress, AZ-900, AI-900, Google Cybersecurity Certificate in progress, AWS Cloud Practitioner.
Blog
Coming soon: KQL detections, phishing analysis, CTF write-ups, and SOC investigation notes.
Achievements
Gold Medalist in BCA Cloud Technology and Information Security. TryHackMe Voyager Level 6. CTF competitor.
Contact
Email: thulashini.selvan@gmail.com