Open to opportunities

Christopher Rajasekar

@christopherrajasekar

Message

I secure enterprise systems through incident response, vulnerability management, and SOC automation.

Canada

Message

I've protected enterprise systems at Log(N) Pacific, Roots, CC&L Financial Group, HCL Technologies, and Bank of New York Mellon through security monitoring, incident response, vulnerability remediation, and security engineering.

At Log(N) Pacific, I reduced critical server vulnerabilities by 100%, automated remediation and STIG implementation across 200+ endpoints, and built Microsoft Sentinel SOAR playbooks and AI-powered dashboards for 100+ daily alerts. I also developed Microsoft Defender detection and containment automation that reduced mean time to respond by 30%.

At Roots, I designed security infrastructure for a 500+ user environment, improved detection coverage by 20%, reduced SIEM false positives by 30%, and increased patch compliance by 15% across Windows, macOS, Linux, and servers.

Across financial and information-services environments, I've led security analysts, conducted risk assessments and audits, aligned controls to NIST, ISO 27001, PCI DSS, and CIS Controls, and translated technical findings into prioritized recommendations for leadership.

Experience

Work history, roles, and key accomplishments

Current

IT Security Support Analyst

Current

Log(N) Pacific

Sep 2025 - Present (11 months)

Conducted vulnerability assessments and implemented PowerShell-based remediations across servers, reducing critical vulnerabilities by 100%. Built Microsoft Sentinel SOAR playbooks and dashboards to automate triage and reduce MTTR by 30%.

Vulnerability Assessment PowerShell SOAR Microsoft Defender Security Audits Risk Assessment

Cyber Security Analyst

Roots

Aug 2023 - Feb 2025 (1 year 6 months)

Managed email and web security operations, blocking phishing and malware threats. Deployed SIEM correlation rules and automation playbooks, reducing false positives by 30% and improving detection coverage by 20%.

SIEM Email Security Web Security PCI DSS Vulnerability Management Forensics Threat Hunting

Intern, Information Security Analyst

CC&L Financial Group

Jan 2023 - Apr 2023 (3 months)

Created security metrics and executive reports for senior leadership, tracking 15+ KPIs. Monitored and triaged daily alerts in Azure Defender and Sentinel SIEM.

Security Metrics Reporting Azure Sentinel SIEM Log Analysis

Senior Technical Lead – IT Security

HCL Technologies

Jun 2019 - Aug 2021 (2 years 2 months)

Directed enterprise-wide vulnerability remediation and security engineering, achieving a 30% improvement in patch compliance. Led a team of 8 security analysts and ensured compliance with NIST and ISO 27001.

Vulnerability Management Risk Assessment Incident Response NIST ISO 27001 Team Leadership Vendor Management

SOC – Incident Response

Bank of New York Mellon

May 2013 - Dec 2018 (5 years 7 months)

Monitored and analyzed security events using IBM QRadar and Splunk. Executed end-to-end incident response including triage, investigation, remediation, and reporting.

QRadar Splunk Incident Response SIEM Security Monitoring