Marc — Security Engineer¶
Security engineer specializing in security operations, endpoint defense, and application security for high-value financial infrastructure. Currently on the security team at Polymarket, securing the platform end-to-end — from the corporate endpoint fleet to the web application surface — in an environment where real money settles real-world outcomes.
Endpoint Security & XDR¶
I own the Cortex XDR deployment across the corporate fleet — detection engineering, prevention policy tuning, and real-time response. Operating within Cortex XSIAM as the unified SecOps platform: case triage, causality-chain analysis, XQL threat hunting, and response playbooks mapped to MITRE ATT&CK. First line of defense against social engineering, phishing, and credential theft targeting employees.
Malware Analysis & Reverse Engineering¶
I reverse engineer real-world malware samples targeting the organization — including campaigns from nation-state groups like BlueNoroff (Lazarus Group / DPRK). Static and dynamic analysis to extract IOCs, map adversary TTPs, and translate findings into XDR analytics rules and XSIAM detection logic that kill threats at execution time. The goal is always durable behavioural detection, not indicators that age out within weeks.
Application Security¶
Secure SDLC integration, code review, vulnerability management, and penetration testing across web2 and web3 application surfaces. Supply chain hardening: dependency pinning, provenance verification, secret scanning, and CI/CD pipeline integrity controls.
Security Operations & Incident Response¶
Detection engineering, alert triage, forensics, post-mortem analysis, and remediation. Correlating endpoint, cloud, and onchain telemetry to surface real threats. I also support onchain monitoring and bug bounty triage for the exchange infrastructure.
Work with me¶
Available for security consulting through Senshi Cyber Consulting SLU — security operations build-out, detection engineering, endpoint hardening, application security reviews, and adversarial assessment of Web3 infrastructure.
Contact: marc@senshi.cc · LinkedIn