Hari Charan Nallamasa

• Investigated and correlated 500+ security events per week using DNIF HyperCloud and
Hyperscale SIEM, identifying indicators of compromise (IOCs) across network, endpoint, and
cloud logs.
• Designed and fine-tuned custom correlation rules and alert logic, reducing false positives by
25% and improving detection accuracy for real threats.
• Conducted log analysis and root cause analysis (RCA) for 100+ security incidents, including
phishing, malware, brute-force attacks, and lateral movement attempts.
• Mapped observed attack patterns to the MITRE ATT&CK framework, strengthening detection
coverage and improving incident classification workflows.
• Worked closely with L2/L3 analysts and IT teams to support containment and remediation
actions.