Deepak Rajan Kannappan

• Assessed application and identity access by reviewing Active Directory roles, group memberships, and privileges, identifying excessive access and reducing unauthorized access exposure by 20%.

 

• Implemented structured joiner–mover–leaver (JML) validation by reviewing account provisioning, role changes, and deprovisioning timelines, reducing stale and orphaned accounts by 25%.

 

• Maintained NIST-aligned access review evidence, security policies, and control documentation, improving audit traceability and compliance response efficiency by 35%.

 

• Validated vulnerability remediation by coordinating patch verification, re-testing affected systems, and documenting closure evidence, reducing unresolved high-risk vulnerabilities by 28%.

 

• Configured and monitored SIEM platforms by correlating authentication logs, endpoint telemetry, and system events across Windows and Linux environments, implementing improved detection logic that increased validated true-positive alerts by 30%.

 

• Investigated security incidents by analyzing anomalous authentication activity, privilege misuse, and endpoint behavior, documenting timelines, root cause findings, and remediation actions, improving investigation consistency and response quality by 25%.

 

• Automated authentication and access log analysis using Python scripts to extract, normalize, and analyze security events, reducing manual investigation effort and triage time by 20%.

 

Graduate coursework focused on application security, network security, vulnerability assessment, incident response, and security governance. Hands-on experience with SIEM-based security monitoring, authentication analysis, risk assessment, and NIST-aligned security controls through practical labs and projects.