Managed SOC and SIEM
Round-the-clock threat detection, investigation and response, delivered by CYSIAM’s UK-based security operations centre and integrated directly into the LIMA service desk.
Alerts are not the hard part
Security tooling generates volume. Thousands of alerts a day is normal, and the great majority are noise. The difficulty is in the small number that are not, and in having someone available around the clock who can tell the difference.
Most organisations we speak to have the licences already. Microsoft Sentinel and Defender are sitting there in the tenancy, generating signals that aren’t always acted on. The tooling is not the gap. The gap is the analysis.
What a managed SOC and SIEM gives you
A SIEM collects logs and security signals from across your environment and correlates them. A SOC is the team of analysts watching what the SIEM produces. Run together, they turn raw alerts into a decision, and a decision into an action.
CYSIAM’s SOC is UK-based, CREST-accredited and staffed 24/7/365, working across Microsoft Sentinel, Defender for Endpoint and CrowdStrike Falcon. Their operating model runs in tiers, with Level 1 triage, Level 2 investigation and Level 3 threat hunting, so the depth of response matches what the situation calls for. Critical incidents carry a one-hour response commitment.
They are also a FIRST-accredited CERT, sharing intelligence with 782 incident response teams across 111 countries. In practice that means threats seen elsewhere inform your detection rules before they reach you.
Powered by CYSIAM, integrated with LIMA
Most MSPs handle security by recommending a third party. They introduce you to a vendor, take a margin, and then you manage that relationship yourself while both suppliers look at each other when something goes wrong.
We do it differently. CYSIAM sits behind LIMA rather than beside us. You deal with LIMA. Your security service runs through the same tickets, the same service reviews and the same account team as the rest of your IT. CYSIAM join those service reviews and speak to you directly, so the independence is preserved, but they do it on our terms and inside our service framework.
What’s covered
24/7/365 UK-based SOC
Multi-tier analysis with a one-hour response commitment on critical incidents, delivered from a CREST-accredited operations centre.
Detection built for your environment
Custom detection engineering that tunes rules to the threats relevant to your business, cutting false positives so real signals stand out.
Response, not just alerting
Automated remediation for known threats, remote endpoint isolation to stop lateral movement, and expert analysis on anything complex.
Proactive threat hunting
Structured hunting using the TaHiTI methodology to find what has not triggered an alert.
Getting more from what you already own
If you hold Microsoft 365 E3, E5 or a Sentinel deployment, a good part of the capability is already paid for. Part of this service is making that investment work harder: fine-tuning Defender and Sentinel, reducing false positives and building detections that reflect your environment rather than a generic baseline.
Incident response retainer
Every organisation should have a plan to follow, a number to call and commercials agreed in advance. Arranging all three during an incident is how organisations end up paying emergency consulting rates for slower help.
CYSIAM’s incident response retainer covers:
Guaranteed 24/7/365 response, digital forensics and threat intelligence
Structured containment and recovery
NCSC best practice guidance
A table-top incident rehearsal exercise with your senior leadership team
Why choose LIMA for managed SOC and SIEM
You get a specialist security operation with an independent view, without adding a second supplier relationship to manage. One contract, one account team, one set of service reviews.
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