Azure Sentinel Managed Service — 24/7 SIEM Operations
Deploying Microsoft Sentinel is easy — operating it effectively is not. Without expert tuning, Sentinel generates thousands of alerts daily, most false positives, while genuine threats hide in the noise. Opsio's Azure Sentinel managed service provides 24/7 SIEM operations: custom analytics rules, threat hunting, incident investigation, and continuous tuning that transforms Sentinel from an expensive log collector into an active threat detection platform.
Trusted by 100+ organisations across 6 countries
90%
Alert Noise Reduction
24/7
SOC Coverage
<15min
Alert Triage
200+
Analytics Rules
Part of Cloud Security & Compliance
What is Azure Sentinel Managed Service?
Azure Sentinel managed service is the outsourced, continuous operation of Microsoft Sentinel — Microsoft's cloud-native SIEM and SOAR platform — covering everything from initial deployment through ongoing detection engineering and incident response. Standard scope across providers such as Managed Sentinel, Kerv, and marketplace-listed Microsoft partners typically includes data connector configuration and ingestion cost governance, custom KQL-based analytics rule development, MITRE ATT&CK-aligned threat hunting, alert triage and incident investigation, SOAR playbook automation via Azure Logic Apps, and continuous tuning to suppress false positives and reduce alert fatigue. Relevant standards and frameworks applied during rule engineering and compliance mapping include NIS2, ISO 27001, NIST CSF, and CIS Controls, while integration touchpoints commonly span Microsoft Defender XDR, Microsoft Entra ID, and third-party sources via CEF and Syslog connectors. Pricing varies widely by ingestion volume and service tier; Microsoft Sentinel itself charges approximately $2.46 per GB ingested beyond free tier allocations, and managed service overlays from specialist providers typically run from $3,000 to Azure Sentinel managed service provides outsourced 24/7 operation of Microsoft Sentinel, Microsoft's cloud-native SIEM and SOAR platform — including data connector management, analytics rule engineering, incident investigation, threat hunting, and continuous tuning.5,000 per month depending on log volume, number of monitored entities, and contracted response SLAs. Opsio delivers this service as a Microsoft Partner operating a 24/7 NOC across its Karlstad, Sweden headquarters and ISO 27001-certified Bangalore delivery centre, with 50-plus certified engineers, a 99.9% uptime SLA, and a delivery model built specifically for mid-market and Nordic enterprise clients who require enterprise-grade detection coverage without the overhead of building an in-house SOC.
Transform Sentinel Into Your Active Threat Detection Platform
Microsoft Sentinel collects data from hundreds of sources — Azure AD, Microsoft 365, firewalls, endpoints, cloud workloads — and applies analytics rules to detect threats. In theory, this sounds powerful. In practice, most organisations struggle with Sentinel because they lack the security engineering expertise to tune analytics rules, the 24/7 analyst coverage to investigate alerts, and the threat hunting capability to find advanced threats that rules alone cannot detect. The result is a SIEM that generates noise without delivering security outcomes. Opsio's managed Sentinel service bridges the gap between technology and security outcomes. Our security engineers configure data connectors across your entire environment, build custom analytics rules mapped to MITRE ATT&CK techniques, develop automated SOAR playbooks for common incident types, and tune detection logic to reduce false positives by up to 90%. Our 24/7 SOC analysts investigate every alert, escalate confirmed threats, and perform proactive threat hunting using KQL queries and behavioral analysis.
The managed service includes continuous Sentinel optimisation: adding new data sources as your environment evolves, updating analytics rules for emerging threats, refining SOAR playbooks based on incident patterns, and managing Log Analytics workspace costs through data tiering and retention policies. Monthly security reports provide executive visibility into threat landscape, detection coverage, and incident trends — demonstrating the value of your Sentinel investment to business stakeholders. Featured reading from our knowledge base: SIEM Managed Service: Elevate Your Security Posture with Us, Expert Managed SIEM Service for Enhanced Security and Compliance, and Managed Security Services vs SIEM: A Comparative Analysis for Businesses. Related Opsio services: SOC Security Services — 24/7 Managed SOC & MDR, Managed Security Services — Enterprise Cybersecurity Partner, Managed Detection & Response — 24/7 Threat Hunting & Containment, and Cybersecurity Service Provider.
Service Deliverables
Data Connector Management
Configuration and monitoring of Sentinel data connectors for Azure AD, Microsoft 365, Defender for Endpoint, firewalls (Palo Alto, Fortinet, Check Point), cloud platforms (AWS, GCP), and custom sources via CEF/Syslog. Data quality validation ensures complete visibility.
Analytics Rule Engineering
Custom detection rules mapped to MITRE ATT&CK techniques — scheduled queries, fusion rules, ML-based anomaly detection, and near-real-time (NRT) rules. Each rule tuned for your environment to maximise true positive rates while minimising alert fatigue.
SOAR Playbook Automation
Automated incident response workflows using Sentinel SOAR (Logic Apps): automatic enrichment with threat intelligence, user and IP reputation checks, automated containment actions, notification routing, and ticket creation in ServiceNow or Jira.
24/7 Threat Investigation
Every Sentinel alert triaged within 15 minutes by certified SOC analysts. Confirmed incidents receive full investigation with attack chain reconstruction, affected asset identification, and remediation guidance. Threat hunting using KQL queries and behavioral analysis.
Cost Optimisation
Log Analytics workspace cost management through data tiering (Basic Logs vs Analytics Logs), retention policy optimisation, table-level ingestion configuration, and commitment tier recommendations. Reduce Sentinel costs by 30-50% without sacrificing detection capability.
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