Raf S.
Microsoft Purview & Data Protection Architect | Cloud Security | Sentinel | Defender XDR | M365 Security | Azure Infra
- Role
- Cloud, Cybersecurity & Threat Detection Engineer at Public Company Accounting Oversight Board (PCAOB)
- Location
- Glendale Heights, IL, US
- LinkedIn followers
- 500 followers
About Raf S.
Builds and fixes cloud security programs in regulated enterprises where audit pressure…
Experience
Cloud, Cybersecurity & Threat Detection Engineer
Public Company Accounting Oversight Board (PCAOB)
Jan 2022 — Present
Lead detection engineering across Splunk and Azure Sentinel, authoring high-fidelity rules mapped to MITRE ATT & CK (brute force, MFA bypass, LOLBins, webshells, Kerberoasting, Golden Ticket)- Built and automated detection-as-code pipelines (GitHub Actions), Python-based IOC enrichment, and SOAR playbooks (Google SOAR+, Splunk Phantom, Sentinel) for enrichment and automated response- Integrated telemetry from Azure, AWS, GCP, Defender XDR, Zscaler, Palo Alto, Salesforce, and ServiceNow, ensuring full SOC visibility- Designed compliance-driven detections for HIPAA and PCI, authored threat models for fintech and healthcare workloads, and partnered with red/purple teams to validate coverage- Delivered executive dashboards mapping detection coverage to MITRE ATT & CK and closing detection gaps identified during adversary simulations.
Education
Wichita State University
Master of Science - MS, Computer Engineering
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