Microsoft Sentinel
A SIEM that finds real threats at a cost you can predict.
Sentinel deployments tend to go one of two ways: everything connected and a bill nobody expected, or a few connectors and rules nobody tuned. We design Sentinel around the threats that matter to you, keep ingestion costs under control and connect it to the people who respond.
Start with a cyber risk assessment
What we build
- Workspace design: retention, access, data tiers and the Sentinel data lake where it fits
- Data connectors chosen by use, with ingestion filtered at collection
- Microsoft Defender XDR integration, so incidents correlate across products
- Analytics rules tuned to your environment, with false positives driven down
- Automation playbooks for common incidents, such as disabling a compromised account
- Workbooks and reports for your team and leadership
- Detection and configuration kept as code in your repository
Cost under control
Sentinel is priced mainly on data ingested. We choose each source by what it is used for, filter at ingestion, use lower-cost tiers for investigation data, take the free Microsoft sources, remove duplicates and commit to a tier once volumes are stable. You see the expected cost before anything is connected.
Round-the-clock cover
A SIEM needs someone watching it. Our security operations centre monitors around the clock, including overnight, weekends and public holidays, working from the detections we engineer. North Ark engineers fix the causes.
How it runs
- Assess: current logging, threats that matter to you, obligations and budget.
- Design: workspace, data sources, rules and response workflow.
- Build: connectors, rules and playbooks deployed as code.
- Tune: false positives removed and costs checked over the first weeks.
- Operate: under Managed Microsoft 365 and security, or handed to your team.
Questions buyers ask
Sentinel or a managed security operations centre?
They answer different questions. Sentinel is the platform. A security operations centre is the people watching it. North Ark provides both: Sentinel engineered for your environment, and a security operations centre watching it around the clock.
Can you reduce our current Sentinel bill?
Usually. Filtering, tiering, removing duplicates and using free sources often make a noticeable difference without losing the detections you rely on.
Do you migrate from another SIEM?
Yes. We map your existing detections and data sources to Sentinel and run the two in parallel before switching over.
Can you work with our existing SOC provider?
Yes. We engineer the detections and playbooks they work from and fix what they find.
Does Sentinel help with SOCI or APRA reporting?
It gives you the detection and evidence needed to meet incident reporting timeframes, as long as someone is watching and escalating.
Start a conversation
See the threats, and the bill, clearly.
Tell us what you log today and what it costs.
Talk to an Engineer