mark karuri

I'm building and testing security capabilities through Wazuh and Splunk SOC labs, where I centralize endpoint telemetry, tune detections, simulate attacks, and document response workflows.

As a freelance cybersecurity specialist, I conduct penetration tests and vulnerability assessments, monitor and triage security events, support incident response, and harden infrastructure with Cisco configurations, firewall rules, and DNS/ARP spoofing countermeasures. My GitHub portfolio includes full kill-chain penetration-testing write-ups and professional reports with findings, severity ratings, proof-of-concept evidence, and remediation recommendations.

At Bigscope International, I lead insurance-fraud investigations using digital forensics, anomaly detection, evidence preservation, and court-ready reporting—experience that directly strengthens my incident investigation and evidence-handling approach.