Security Information Event Management SIEM migration is a major undertaking for any security team, involving the careful movement of detection rules, log pipelines and correlation strategies from one platform to another. Whether driven by cost, scalability, or functionality, the decision to switch SIEM solutions is rarely simple.
At Amicis Group, we support businesses through every stage of SIEM migration, offering practical expertise, vendor-neutral advice and fully managed support. As a UK-based MSSP, we understand how to deliver secure, compliant transitions that preserve detection quality and reduce operational risk.
Why Migrate Your SIEM?
Organisations may consider SIEM migration for a range of reasons:
- Your current solution no longer scales effectively
- License or storage costs are becoming unsustainable
- Detection capabilities are outdated or limited
- You want to move from on-premise to cloud or vice versa
- Integration with other tools or managed services is lacking
Before making the leap, it is vital to fully assess both your current coverage and your future needs. A successful migration is about more than just moving data. It is about maintaining visibility and protecting your detection posture.
Understanding SIEM Styles
Different SIEM solutions handle log data and correlation in very different ways. Key variables include:
On-premise vs cloud-based
Moving to the cloud introduces new considerations around bandwidth, security, and compliance.
Raw vs normalised log data
Some platforms ingest raw logs, while others transform them during collection. This affects how rules are written and how data is queried.
Live correlation vs batch processing
Timing and method of correlation impact how quickly and effectively threats are detected.
Recognising these differences early helps avoid costly surprises during deployment.
Data Acquisition and Normalisation Issues
Migrating SIEMs means re-establishing data pipelines for every log source. Challenges include:
- Ensuring compatibility with new parsing formats and field structures
- Rebuilding firewall and collector configurations, especially when moving to a cloud-native SIEM
- Avoiding data gaps due to volume spikes or misconfigured inputs
Amicis Group helps you plan your ingestion strategy and align each data source to the right format and destination, ensuring nothing is missed.
Correlation and Detection Gaps
Correlation is where SIEMs deliver value, but each platform does it differently. You may need to:
- Rebuild rules using a new query language or correlation engine
- Replace deprecated rule logic with updated equivalents
- Translate use cases into new detection models or playbooks
Rather than performing a one-to-one migration, we help clients map detection content to threat categories using MITRE ATT&CK, ensuring like-for-like coverage or improvement.
Security and Governance Considerations
SIEM migration is also a matter of trust. As you move log data and credentials between environments, ensure that:
- Identity verification for log sources is in place
- Storage is encrypted and access is restricted by role
- Admin and analyst permissions are clearly managed
We apply best practices to user provisioning, audit logging, and platform hardening. This delivers a secure SIEM foundation from day one.
Call Amicis Group today on 0333 305 5348 , or use our brief contact form on our contact us page.
Migrating Detection Content
The most overlooked risk in SIEM migration is the loss of effective detection rules. Many organisations accumulate years of custom content that may not be portable to a new platform. We support this transition by:
- Auditing your current detection set to identify duplicates, gaps or broken rules
- Prioritising detections based on business relevance and threat coverage
- Rebuilding or adapting rules to the new platform using equivalent MITRE mappings
- Creating dashboards and alerts that reflect your old reporting, with added insight where possible
This process ensures continuity of coverage and avoids “blind spots” during and after migration.
Common Migration Pitfalls
Avoid these frequently made mistakes:
- Lifting and shifting all rules without evaluating relevance
- Failing to align parsing between log sources and correlation logic
- Underestimating the time and complexity of dashboard recreation
- Ignoring licensing differences around ingestion volume or retention
With Amicis Group, you gain a partner who has seen these issues first-hand and knows how to avoid them.
How Amicis Group Supports SIEM Migration
As a Managed Security Services Provider, we take the burden of SIEM migration off your internal teams. Our approach includes:
- Pre-migration audits and strategy workshops
- Detection mapping and content rebuilds based on real threats
- Source system integration, normalisation and tuning
- Full visibility testing and validation before go-live
- Ongoing monitoring, optimisation and reporting
We have experience with leading SIEM platforms including Splunk, Microsoft Sentinel, Devo, QRadar, ArcSight, LogRhythm and others.
Plan for Long-Term Success
SIEM migration is not just a technical switch, it is a transformation of how your organisation detects and responds to cyber threats. With the right approach, you can improve performance, reduce cost, and enhance the quality of security operations.
Whether you are moving from legacy systems or optimising your move to a cloud-native SIEM, Amicis Group provides the planning, people and process to make it successful.
Talk to Our SIEM Experts
Call us on 0333 305 5348 to discuss your needs or contact us via our brief form and find out how we can support your SIEM migration, ensuring a smooth transition and a stronger security outcome.
You may be interested in our Security Information & Event Management (SIEM) service page.
