Cairn Sovereign Security

Services

Services

Five capabilities, each built on foundations you can audit and own. Delivered together as a managed service, or individually.

01

Managed Detection & Response

SOC

Built on Wazuh + OpenSearch

24/7 monitoring, detection, triage, and response from a UK-based. We write and tune the detection rules — and you can read every one of them.

Outcomes
Faster, explainable detection; no black-box scoring; detection logic you own.
Includes
  • Log collection and correlation
  • Threat detection and hunting
  • Incident triage and response
  • Detection-rule development
  • Reporting aligned to NCSC guidance
02

Infrastructure Monitoring & Observability

Built on Zabbix

Full-estate monitoring of availability, performance, and capacity — without per-metric licensing deciding what you're allowed to see.

Outcomes
Complete visibility, early warning, no license-driven blind spots.
Includes
  • Infrastructure and application monitoring
  • Alerting and escalation
  • Capacity trends
  • Dashboards and reporting
03

Network & Perimeter Security

Built on pfSense / OPNsense

Inspectable, self-hostable firewalls, segmentation, and secure remote access — perimeter you can read.

Outcomes
An auditable perimeter, no opaque appliances, controls you can verify.
Includes
  • Firewall design and management
  • Network segmentation
  • VPN and secure remote access
  • IDS / IPS
  • Traffic inspection
04

Security Engineering & Automation

Built on Ansible + GLPI

Hardening and change delivered as code — every configuration a reviewable, version-controlled artefact mapped to CIS/STIG benchmarks — underpinned by a single auditable record of every asset.

Outcomes
Consistent, provable hardening; a real CMDB; change you can audit.
Includes
  • Config-as-code hardening
  • CIS / STIG baselines
  • Patch and change automation
  • Asset inventory and CMDB (GLPI)
  • ITSM workflows
05

Advisory & Compliance

Built on NCSC CAF · ISO 27001 · Cyber Essentials Plus · NIS

Pragmatic governance and assurance from people who also run the systems — so the advice is buildable, not theoretical.

Outcomes
Audit-ready posture, defensible decisions, less compliance theatre.
Includes
  • Gap assessments
  • NCSC CAF readiness
  • ISO 27001 and Cyber Essentials preparation
  • Security architecture review
  • Board and risk reporting

Not sure which you need?

Tell us the problem. We will tell you which of these actually applies — and which don't.