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Managed Sentinel — the platform is powerful. The operation is what matters.
Sentinel gives you a single security-operations platform across cloud, identity, endpoint and SaaS. What it does not give you is detection engineers, SOC analysts, playbook developers or cost optimisation. We do — deploy, configure, tune, operate and continuously improve, by a UK-based Microsoft partner who runs Sentinel every day.
Your tenantDetection engineeringSOARFinOps
What we do
Five disciplines, run as one platform service.
Deployment
Tenant design, data-source integration (M365, Entra ID, Defender, third-party SaaS, multi-cloud), workspace architecture and cost-aware ingestion design — built inside your own tenant.
Bespoke connectors
Detection engineering
Custom analytics rules built to your environment, threat model and attack surface. MITRE ATT&CK-aligned coverage mapping. Continuous tuning to reduce noise.
Version-controlled12 releases / yr
Automation
Playbooks for routine response patterns — account lockouts, credential resets, endpoint isolation, IP blocking. Most routine incidents close without human involvement.
SOAR + agentic AI
Cost optimisation
Sentinel’s pricing rewards careful data management. We tier data, tune ingestion and archive what doesn’t need to be hot — typically reducing run-rate by 20–40% within the first quarter.
FinOpsOpen book
Ongoing operations
Integrated into our Managed SOC, or delivered as a managed platform service while your team runs the analyst function. Your choice — both keep Sentinel in your tenant.
SOC or platform-only
Filling the gaps
Where Microsoft still leaves gaps — external attack-surface management, CVE containment — we layer in RoboShadow and Lighthouse, so coverage is complete, not just convenient.
RoboShadowLighthouse
The FinOps angle
Sentinel gets a name for being expensive. It isn’t.
It earns that reputation only where people dump unnecessary logs and ask it to do things it doesn’t need to. Run with discipline, it is a cost-effective SIEM — and our model is built to drive your total cost of ownership down over time, not up.
20–40%
Run-rate reduction
Typical reduction in Sentinel run-rate within the first quarter through data tiering, ingestion tuning and archiving cold data.
90%
Automation target
As SOAR and agentic automation mature, more routine response closes without human time — and because our model is activity-based, lower effort means lower cost to you.
Open book
Margin you can see
We tell you the margin we make on ancillary technology and licensing. No account manager incentivised to upsell you software you don’t need.
Why 3Gi for Sentinel
We don’t just deploy it. We operate it.
✓
Microsoft Solutions Partner with a tier-one security designation and direct access to Microsoft engineering for escalations.
✓
Operating Sentinel daily across multiple mid-market estates — pattern recognition others can’t match.
✓
Sentinel is the core of our Managed SOC — we run it for a living, not as a one-off deployment.
✓
Ready for what’s next: as Microsoft folds Sentinel into Defender as an extended detection & response platform, we’re already building for it.
Next step
Get the platform operated, not just installed.
Book a Sentinel scoping call and we’ll map your data sources, design cost-aware ingestion, and show you what a tuned, version-controlled detection set looks like.
A Digital Transformation Company.