Security / Managed SIEM
Managed SIEM, tuned and run for you.
We run SIEMs for a living. Microsoft Sentinel, Splunk, Elastic, or QRadar — whichever fits your environment. Custom detection content, SOAR playbooks, and tuning that keeps up with how fast the threat landscape changes.
What's included
Log source integration
On-prem, cloud, SaaS, identity, endpoint — whatever generates logs, we pipe it in. Parser development, schema mapping, and source health monitoring all live on our side.
Custom detection engineering
Detection content tailored to your environment and your industry's threat profile. Everything gets mapped to MITRE ATT&CK, tested against known-good traffic before deployment, and version-controlled so you can see what changed.
SOAR playbook automation
Auto-enrichment, auto-containment where your policy allows it, and auto-ticketing for everything else. Our analysts spend their time on decisions, not copy-pasting IP addresses into lookup tools.
Continuous tuning
False-positive reduction cycles run weekly. Detection coverage reviews happen monthly. Retention and storage get optimized quarterly. If your environment changes, the content changes with it.
Compliance reporting
Pre-built dashboards and scheduled reports for SOC 2, PCI-DSS, HIPAA, ISO 27001, and NIST CSF. When auditors ask for evidence, we export it the same day.
Licensing optimization
SIEM ingest costs spiral if nobody watches them. We right-size data sources, filter verbose streams at the forwarder, and benchmark against industry peers. Most clients see ingest costs drop 20-40% in the first 90 days.
Platforms we operate
Managed SIEM FAQ
We already have a SIEM. Can EFROS take over operation?
Yes. Most engagements start with assuming operation of an existing SIEM. We audit current configuration, log sources, detection coverage, and cost — then optimize in the first 30-60 days before introducing custom content.
What if we don't have a SIEM yet?
We recommend based on your environment (cloud mix, data volume, budget, compliance needs) and deploy end-to-end. Microsoft Sentinel is often the fastest path for M365-centric orgs; Elastic or Splunk for larger or hybrid environments.
Who owns the detection content — EFROS or us?
You do. All custom detection rules, playbooks, and tuning are documented in your environment and handed over on request. No vendor lock-in via opaque detection libraries.
How do you handle SIEM cost optimization?
We audit ingest volume, classify log sources by security value, and eliminate or summarize low-value data. Verbose sources (Windows event logs, cloud audit logs) are filtered at the forwarder. Typical reduction: 20-40% on ingest costs within 90 days.
Related programs
SIEM works best alongside
Managed Detection & Response
EDR + XDR + SOAR layered on top of SIEM. Detection content that fires through to active containment, not just dashboards.
Open24/7 SOC as a Service
Analysts who actually triage the alerts the SIEM produces — escalation SLA in writing, not aspiration.
OpenVirtual CISO
Strategic oversight of detection coverage, compliance mapping, and board-grade quarterly reporting.
OpenIncident Response Retainer
Pre-engaged IR commander for when a SIEM detection turns into a real incident.
OpenMSSP TCO Calculator
3-year build-vs-buy comparison: in-house SIEM operations against managed MDR with full math.
OpenFree Security Scan
60-second external scan of your domain — DNS, email auth, TLS, headers — before you scope SIEM ingest.
OpenSIEM spend out of control?
Free assessment. We look at your ingest volume, detection coverage, and current spend, then benchmark it against comparable companies. You leave with a clear picture of what's worth keeping and what's costing you money.
Run Free Security ScoreSIEM operations stack
MDR — SIEM with response
24/7 SOC operating the SIEM with pre-authorized containment.
OpenSOC as a Service
Tier 1-3 monitoring on top of the managed SIEM.
OpenvCISO defines SIEM scope
Named operator decides what gets logged and what gets alerted on.
OpenM365 + Microsoft Sentinel
Native M365 telemetry into Sentinel for unified SIEM.
OpenZero Trust telemetry
Identity + device + network signals that feed SIEM detections.
OpenSIEM for SOC 2 CC7
Logging + monitoring evidence aligned to Trust Services Criteria.
Open