Cyber security & software engineering · Guernsey & Worldwide
Most breaches aren’t clever. They’re unmanaged exposure.
QMC4 is a Guernsey-based cyber-security and software-engineering practice serving enterprise clients worldwide. We run Continuous Threat Exposure Management (CTEM) backed by a 24/7 SOC, managed Microsoft security, and AI data exposure governance powered by Ray Security. No dashboards as decoration. No theatre.
Flagship / Continuous Threat Exposure Management
Exposure is a state you manage, not a report you file.
An annual pen test and a spreadsheet of CVEs tell you what was true last quarter. CTEM tells you what an attacker could do to you today.
We run Gartner's five-stage cycle (Scope, Discover, Prioritise, Validate, Mobilise) mapped to what your business genuinely can't afford to lose.
The 5 CTEM Pillars
- Scope: Identify critical assets and crown jewels.
- Discover: Map external, cloud & Shadow AI attack surfaces.
- Prioritise: Rank by real exploitability, not raw CVSS noise.
- Validate: Prove exposures with automated threat path checks.
- Mobilise: Remediate with clear operational accountability.
Service Index
What we run, and where it sits.
One accountable practice. CTEM sets the priorities; the SOC and managed security do the work; managed IT (MSP), integration and Microsoft engineering keep the ground solid; the software division builds what doesn’t exist yet.
- 01 Exposure Management (CTEM) Continuously find, rank and prove the exposure an attacker could actually exploit. exposure mgmt · attack surface
- 02 AI Exposure & Shadow AI (Ray Security) Agentless AI Data Loss Prevention (DLP), Shadow AI discovery and prompt guardrails. Shadow AI · Agentless DLP
- 03 Managed Security (MSSP) We run your security operations: detection, response and the vigilance in between. MSSP · MDR · 24/7 monitoring
- 04 Security Operations (SOC) A SOC without the capital cost. Monitoring, threat hunting and incident response on tap. SOC as a service · threat hunting
- 05 Managed IT Services (MSP) The IT that keeps working, with security built in rather than bolted on afterwards. managed IT · MSP · cloud support
- 06 Systems Integration We make the parts of your estate agree with one another, securely and on purpose. system integrator · cloud migration
- 07 Microsoft Security Sentinel, Defender and Entra, run properly. A Microsoft partner, not a box-shifter. Microsoft partner · Sentinel
- 08 Software Engineering (RAG & AI) Production RAG and secure AI systems, built by people who also know how to break them. RAG · vector search · AI dev
- 09 Cyber Essentials Assessment Certification readiness and assessment: the real work, not a checkbox. Cyber Essentials · readiness
Flagship
AI Security & Data Control
Delivery engine · 24/7
Foundation · build & run
Engineering & Compliance
Control every AI tool touching your enterprise data.
Generative AI and custom LLM agents are rapidly creating the largest unmanaged exposure surface in enterprise IT.
Through our strategic partnership with Ray Security, QMC4 brings agentless AI Data Loss Prevention (DLP) and Shadow AI discovery directly into our managed security practice and 24/7 SOC operations.
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Complete Shadow AI Discovery: Instantly locate every sanctioned, unsanctioned, or rogue AI tool accessing company data across endpoints and cloud.
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Agentless AI DLP & Guardrails: Prevent sensitive PII, source code, and customer data from leaking into public AI training sets or prompts.
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Managed SOC Telemetry: Real-time AI threat telemetry ingested directly into QMC4's Microsoft Sentinel SIEM & SOC escalation playbooks.
Live AI Risk Containment
See sanctioned vs shadow AI tools in real time. Enforce policy without slowing down employee productivity.
Interactive Diagnostic Tool
Calculate your AI Exposure Posture Score.
Answer 3 quick operational questions to evaluate your vulnerability to Shadow AI data leakage and exposure risks.
Diagnostic Exposure Report
Your organization exhibits high exposure to unmanaged Shadow AI data leakage and unvalidated attack surfaces.
Microsoft Partner
A SOC that runs on what you already pay for.
If you're on Microsoft 365 and Azure, you've already bought half a security platform. As a Microsoft partner, we turn Sentinel, Defender XDR, and Entra into a unified managed SOC.
Unified Microsoft Workloads
Sentinel SIEM • Defender XDR • Entra Zero Trust Identity • M365 Hardening
Field Notes
From the practice.
Pattern, posture and the anatomy of real incidents, written by the people doing the work, for the boards, finance teams and IT leads who own the risk.
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Why we built QMC4 Cyber the way we did
Most cyber security companies bolted AI onto what they were already doing. We came at it from the other direction, and that changes the shape of the service.
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A phished mailbox is a 90-day breach in slow motion
Anatomy of the most common pattern we see: what it looks like at week one, week three and week thirteen, and why most businesses only catch it at the end.
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Prompt injection and the new attack surface
When the attacker isn’t targeting your code, but the AI that reads it, or the AI agent that runs inside your app. The defensive playbook for an attack that may never be fully solved.
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A free security pipeline in an afternoon
Four layers of automated checks (pre-commit hooks, secret scanning, dependency alerts and static analysis) wired into GitHub, so the boring stuff happens on every commit. Total cost: zero.
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Cloud security for the accidental SaaS founder
The grown-up conversation about the cloud layer: RLS, IAM and secrets management in plain English. Plus a pre-launch checklist to run before the next user signs up.
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Prompting for secure code
How to brief an AI so it gives you code you can actually trust, the same way you’d brief a junior developer who’s technically brilliant but has never met a hacker.
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Vibe coding for the win? True or false?
Part 1 of a 5-part series. What vibe coding is, where the headlines overstate the risk, where the real security failures live, and the tools and habits that catch the common mistakes.