Microsoft Sentinel for FedRAMP High and DoD IL5 (2026 Enterprise Blueprint)

Why Microsoft Sentinel for Federal + DoD Workloads

Microsoft Sentinel deployed on Azure Government is the SIEM + SOAR choice for federal agencies, DoD contractors, and intelligence community workloads requiring FedRAMP High, DoD IL4/IL5/IL6, or CMMC Level 2/3 compliance. The decision factors: (1) Sentinel runs natively on Azure Government with full IL5 + IL6 boundary controls; (2) it integrates natively with Defender XDR + Entra ID + Microsoft Purview for unified audit; (3) commercial Sentinel does NOT meet IL5/IL6 — Azure Government Sentinel is the only Microsoft-native option.

The 6-Phase Sentinel-for-FedRAMP Deployment

EPC Group's standard FedRAMP / DoD Sentinel deployment runs 16-24 weeks:

Phase 1 — Discovery (Weeks 1-3): Inventory current SIEM + SOC tooling, current FedRAMP / CMMC posture, audit baseline. Document what Sentinel must replace or integrate with.

Phase 2 — Azure Government Tenant Design (Weeks 4-6): Set up Azure Government commercial tenant (or IL5/IL6 tenant for DoD), Entra ID Government, dedicated subscription for Sentinel workspace.

Phase 3 — Data Source Architecture (Weeks 7-10): Configure connectors for Defender XDR (Government), Entra ID (Government), Microsoft 365 Government, Azure Activity Log, Azure AD Audit, and any third-party data sources via custom connectors or Azure Logic Apps.

Phase 4 — Detection + Analytics Rule Build-Out (Weeks 11-14): Deploy 100-200 KQL analytics rules covering MITRE ATT&CK techniques relevant to federal threat landscape: APT detection, insider threat, lateral movement, data exfiltration, identity compromise.

Phase 5 — SOAR Playbook Development (Weeks 15-18): 20-40 automated response playbooks covering common incident types: account compromise, ransomware detection, anomalous Conditional Access bypass, data exfiltration.

Phase 6 — SOC Operationalization (Weeks 19-24): SOC analyst training, runbook documentation, FedRAMP audit-ready evidence collection, ATO support package.

Data Retention + Compliance Requirements

FedRAMP High requires 1-year hot retention of audit logs and 6-year archive retention. DoD IL5 requires 2-year hot retention + 7-year archive. Sentinel + Purview Audit Premium delivers tamper-evident logs with 7-year retention by default in Government tenants. Cost: budget $50-150K/year for Sentinel data ingestion at 1,000-5,000 user federal tenants depending on log volume.

MITRE ATT&CK Coverage Targets

EPC Group standard FedRAMP Sentinel deployment achieves MITRE ATT&CK coverage targets:

• Initial Access: 90 percent coverage
• Persistence: 95 percent coverage
• Privilege Escalation: 90 percent coverage
• Defense Evasion: 85 percent coverage
• Credential Access: 95 percent coverage
• Lateral Movement: 90 percent coverage
• Exfiltration: 90 percent coverage

EPC Group Engagement

EPC Group runs Microsoft Sentinel for FedRAMP / IL5 engagements at $200K-$600K depending on scope and tenant size. Includes the 6-phase deployment + 60-day hypercare. Ongoing managed SOC services run $25K-$100K/month for 24/7 federal-cleared analyst coverage.

See: Microsoft Defender XDR Consulting Services, Microsoft Sentinel SIEM Enterprise Security Guide, Government Analytics on Power BI: FedRAMP Guide 2026.

Schedule a FedRAMP Sentinel readiness assessment at /contact.