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 · 4.9/5 client rating
90%
Alert Noise Reduction
24/7
SOC Coverage
<15min
Alert Triage
200+
Analytics Rules
What is Azure Sentinel Managed Service?
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.
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.
What We Deliver
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.
Ready to get started?
Get Your Free SIEM AssessmentWhy Choose Opsio
90% alert noise reduction
Expert analytics rule tuning eliminates false positives so your team and our analysts focus on real threats, not noise.
MITRE ATT&CK mapped
Detection coverage mapped to MITRE ATT&CK framework with visibility into which techniques are covered and which gaps remain.
24/7 human investigation
Every alert investigated by certified analysts — automated playbooks handle known patterns, humans handle novel threats.
Sentinel cost control
Data tiering and ingestion optimisation reduce Sentinel costs by 30-50% while maintaining full detection capability.
Not sure yet? Start with a pilot.
Begin with a focused 2-week assessment. See real results before committing to a full engagement. If you proceed, the pilot cost is credited toward your project.
Our Delivery Process
SIEM Assessment
Evaluate current Sentinel configuration, data sources, analytics rules, and detection gaps. Map existing coverage against MITRE ATT&CK. Deliverable: SIEM maturity assessment. Timeline: 1-2 weeks.
Detection Engineering
Configure data connectors, build custom analytics rules, develop SOAR playbooks, and tune detection logic for your environment. Timeline: 2-4 weeks.
24/7 SOC Operations
Begin managed monitoring, alert investigation, threat hunting, and incident response with SLA enforcement. Timeline: Ongoing from week 4.
Continuous Improvement
Monthly detection coverage reviews, analytics rule updates, false positive tuning, and Sentinel cost optimisation. Quarterly threat landscape briefings. Timeline: Ongoing.
Key Takeaways
- Data Connector Management
- Analytics Rule Engineering
- SOAR Playbook Automation
- 24/7 Threat Investigation
- Cost Optimisation
Azure Sentinel Managed Service — 24/7 SIEM Operations FAQ
What is Microsoft Sentinel managed service?
A managed Sentinel service outsources the 24/7 operation of Microsoft's cloud-native SIEM platform to security specialists. Opsio handles data connector configuration, analytics rule engineering, SOAR playbook development, alert investigation, threat hunting, and continuous tuning. This delivers the security outcomes of an in-house SOC without the $1M+ annual cost of building one, while ensuring Sentinel operates at its full potential.
How does Opsio reduce Sentinel alert noise?
We reduce false positives through custom analytics rule tuning specific to your environment. This includes adjusting detection thresholds, adding exclusions for known benign patterns, implementing multi-stage detection that correlates multiple signals before alerting, and using ML-based anomaly detection calibrated to your baseline. Typical reduction is 80-90% of false positive alerts within the first month of managed service.
What does Azure Sentinel managed service cost?
Sentinel infrastructure costs depend on daily data ingestion volume — typically $2-$10 per GB ingested. Opsio's managed service adds $5,000-$15,000 per month for 24/7 SOC operations, detection engineering, and threat hunting depending on environment size and complexity. Our cost optimisation practices typically reduce Sentinel infrastructure costs by 30-50% through data tiering and ingestion optimisation, offsetting a significant portion of the management fee.
Can Opsio manage Sentinel alongside other security tools?
Yes. Sentinel integrates with your broader security stack — we configure data connectors for CrowdStrike, SentinelOne, Palo Alto, Fortinet, Proofpoint, Okta, and dozens of other tools. Opsio manages Sentinel as the central SIEM while coordinating with your existing EDR, firewall, and identity security tools for unified threat detection and response across your entire security ecosystem.
Still have questions? Our team is ready to help.
Get Your Free SIEM AssessmentIs Your Sentinel Actually Stopping Threats?
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Azure Sentinel Managed Service — 24/7 SIEM Operations
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