Athiyan Ramesh Kumar

Athiyan Ramesh Kumar

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Aspiring Security Analyst | CompTIA Security+ | Google Certified Cybersecurity Professional | MS in Cybersecurity - Georgia Tech
California, United States

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Jobs verified_user 0% verified
  • (
    Cyber Security Engineer
    (RS Technologies Inc) - CNA Insurance
    Jul 2025 - Current (1 year 4 months)
    Manage enterprise vulnerability management programs across 1,000+ cloud and on-premises assets using Tenable.io, Tenable.sc, Nessus, and Rapid7 InsightVM, identifying and prioritizing critical security exposures to reduce organizational risk. Investigate 100+ weekly security alerts using Splunk Enterprise Security, Microsoft Sentinel, and IBM QRadar, accelerating threat detection and reducing incident response timelines across enterprise systems. Develop and optimize SIEM correlation rules, threat detections, and alerting logic, reducing false-positive alert vol
  • Acadia Healthcare
    Information Security Engineer
    Acadia Healthcare
    Jul 2024 - Jul 2025 (1 year 1 month)
    Implemented Zero Trust access controls using Entra ID, Okta SSO, MFA, Conditional Access Policies, and RBAC, strengthening identity security and reducing unauthorized access risks across enterprise systems. Administered CyberArk PAM for 150+ privileged accounts, performing credential rotation, session monitoring, and access reviews to improve privileged access governance and compliance readiness. Strengthened cloud security posture across Azure and AWS using Defender for Cloud, AWS Security Hub, CloudTrail, and CSPM technologies, improving compliance visibility and reducing cloud misconfiguration risks. Developed SIEM detections, dashboards, and security automation workflows using Microsoft Sentinel, Splunk, Python, and PowerShell, reducing
  • ICICI Bank
    Cyber Security Analyst
    ICICI Bank
    May 2021 - Jul 2023 (2 years 3 months)
    Monitored and analyzed 50+ daily security events using Splunk and IBM QRadar, identifying malware activity, unauthorized access attempts, and indicators of compromise across enterprise banking infrastructure. Performed threat hunting, incident triage, and security investigations using MITRE ATT&CK, MISP, VirusTotal, and threat intelligence feeds, improving identification of emerging threats and attack patterns. Conducted vulnerability assessments across 500+ endpoints using Nessus, Qualys, Nmap, and security scanning tools, prioritizing remediation efforts and reducing organizational risk exposure. Managed endpoint security investigations using CrowdStrike Falcon, Microsoft Defender for Endpoint accelerating malware containment and improvin
Education verified_user 0% verified
  • Georgia Institute of Technology
    Georgia Institute of Technology — Master of Science - MS, Cybersecurity
    Georgia Institute of Technology
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