What Is MDR (Managed Detection and Response)?

Managed detection and response (MDR) is a security service in which an external team monitors your environment around the clock, detects threats using a combination of technology and human analysts, and actively responds — investigating, containing, and remediating — rather than simply forwarding you alerts.

How MDR works

An MDR provider ingests telemetry from your endpoints, network, cloud workloads, and identity systems into a managed SIEM or XDR platform. Detections are tuned to your environment to cut false positives, and a security operations team triages what fires 24/7. When something is real, they follow an agreed playbook: investigate, contain (for example, isolate a host or disable an account), remediate, and report — with the threat mapped to frameworks like MITRE ATT&CK.

MDR vs EDR vs MSSP vs SOC

• EDR (endpoint detection and response) is a tool that watches endpoints. MDR is a service that operates EDR and other tools for you.
• MSSP (managed security service provider) traditionally manages devices and forwards alerts. MDR goes further — it investigates and responds, not just notifies.
• An in-house SOC gives you full control but requires hiring, training, and retaining a 24/7 analyst rota — expensive and hard to staff. MDR delivers the same outcome as a service.

What to look for in an MDR provider

• True 24/7 coverage with response (containment), not just monitoring.
• Defined response SLAs by severity, and a clear escalation path.
• Coverage across endpoint, network, cloud, and identity — not endpoint alone.
• Vendor-neutrality, so it works with the tools you already own.
• Transparent reporting on what was detected and stopped.

Do you need MDR?

If you have security tools but no one watching them outside business hours — or no security team at all — MDR closes the gap without the cost of building a SOC. It is also a fast way to satisfy customer and cyber-insurance requirements for 24/7 monitoring and incident response.

RHC Solutions provides managed security and MDR as a fully managed or co-managed service. For the broader program — assessments, IAM, and compliance — see cyber security.