
Vishnu Shivalal P
@vishnushivalalp
I build detection and incident-response workflows that reduce false positives and accelerate threat containment.
What I'm looking for
At CodeGreen Systems, I monitor 1,500+ endpoints and 2,000+ user accounts, handling alert triage, threat hunting, IOC analysis, and end-to-end incident response.
I've reduced false positives by 75% by optimizing SIEM/EDR detection logic and cut critical-threat MTTR by 35% through standardized response playbooks and automated workflows.
I build Python and Bash automation for log analysis, IOC enrichment, and alert triage, reducing manual investigation time by 25% across 1,000+ alerts each month. I also integrate threat intelligence feeds and investigate persistence, lateral movement, malware, and phishing outbreaks.
Earlier, I performed vulnerability assessments and web and mobile penetration testing using Nessus, OpenVAS, Nuclei, Burp Suite, Nmap, and OWASP ZAP. I enjoy strengthening SOC operations through practical detection engineering, threat hunting, and clear security reporting.
Experience
Work history, roles, and key accomplishments
Security Operations Center Engineer
CodeGreen Systems LLC
Feb 2023 - Present (3 years 7 months)
Developed and integrated custom detection rules and threat intelligence feeds into SIEM platforms. Managed the full incident lifecycle, from initial triage to root cause analysis and post-incident reporting.
Cyber Security Intern
Brototype
Feb 2022 - Dec 2022 (10 months)
Executed comprehensive vulnerability assessments across enterprise infrastructure using Nessus, OpenVAS, and Nuclei. Deployed and configured Elastic Agent and Fleet Server across mixed Windows and Ubuntu environments to centralize endpoint monitoring.
Education
Degrees, certifications, and relevant coursework
University of Kerala
Bachelor of Computer Applications, Computer Applications
2018 - 2021
Grade: 6.9
Activities and societies: IT Infrastructure Management
Pursued a Bachelor of Computer Applications (BCA) from the University of Kerala, completing the program in May 2021.
Tech stack
Software and tools used professionally
Availability
Location
Authorized to work in
Website
vishnushivalalp.medium.comPortfolio
tryhackme.com/p/vishnushivalalpSalary expectations
Social media
Job categories
Skills
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