SIEM Services UK
Outsourced SIEM for UK SMEs — Microsoft Sentinel + custom detection rules, log retention, and 24/7 monitoring without the cost of building an in-house SOC. No long contract.
Fixed
Managed SIEM entry price
90-day
Log retention as standard
24/7
Continuous monitoring
High
In-house SIEM engineer cost
Cybersecurity Consulting + 24/7 SOC Monitoring
Every Gridisys engagement is built on two pillars — strategic consulting to design the right controls, and managed SOC monitoring to keep them effective.
Cybersecurity Consulting
UK consulting engagements: risk assessment, security architecture, conditional access design, compliance (Cyber Essentials, UK GDPR, FCA PS21/3, NIS2), incident-response planning. Board-ready documentation, no jargon, no surprise invoices.
- Risk assessment + security architecture review
- Conditional access + Entra ID hardening design
- Cyber Essentials / UK GDPR / FCA / NIS2 compliance support
- Incident response planning + tabletop exercises
- Vendor + supply-chain security assessment
- Board / DPO reporting + evidence pack
Managed SOC Monitoring · 24/7
AI-augmented Security Operations Centre — continuous monitoring across Microsoft 365 / Entra ID, Defender, on-prem, and cloud. UK-based analysts, sub-hour triage on critical alerts. No long contract required.
- 24/7 SIEM monitoring — Microsoft 365, Entra ID, Defender, Azure, on-prem logs
- BEC + mailbox-compromise + OAuth grant abuse detection
- Suspicious sign-in + conditional access drift alerting
- Ransomware + lateral-movement detection from EDR + Defender
- Sub-hour triage on critical alerts, monthly ops report
- Optional + integrated with consulting engagements
Most engagements start with consulting (1-2 weeks), then SOC monitoring (ongoing ) keeps the controls effective.
Pricing tailored to your needs
Every engagement is scoped to your environment and requirements. Book a free consultation for a tailored quote — no obligation.
What we cover
Practical, board-ready consulting — no jargon, no surprise invoices.
SIEM Deployment & Integration
We deploy and configure Microsoft Sentinel (or integrate your existing SIEM) and connect Microsoft 365, Entra ID, Defender, Azure, and on-prem log sources.
Custom Detection Rules
We write and tune detection rules for UK-relevant threats: BEC, ransomware staging, OAuth grant abuse, conditional access drift, and impossible-travel sign-ins.
24/7 Monitoring & Triage
Continuous monitoring of SIEM alerts with sub-hour triage on critical detections. False positives tuned out weekly.
Log Retention & Compliance
90-day log retention as standard (extendable to 1 year). Meets UK GDPR, Cyber Essentials, and FCA record-keeping requirements.
Threat Intelligence Integration
We integrate UK-relevant threat intelligence feeds (NCSC, CISA, commercial) so your SIEM detects emerging IOCs automatically.
Monthly Tuning & Reporting
Monthly detection-rule tuning, false-positive reduction, and a board-ready report on alerts, trends, and posture.
How we work
Scoping call (20 min)
We identify your log sources, retention requirements, and compliance drivers. Fixed monthly price agreed.
SIEM deployment (3-5 days)
Sentinel deployed (or existing SIEM integrated), log sources connected, baseline detection rules + threat intel feeds configured.
24/7 monitoring begins
Continuous monitoring with sub-hour triage. Weekly false-positive tuning.
Monthly review
Detection rule tuning, posture report, and recommendations delivered monthly.
Sectors we protect
Managed SIEM without the in-house cost
Sentinel deployed, detection rules written, 24/7 monitoring. No SIEM engineer salary required.
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