Infrastructure Architecture & Migration
Change the infrastructure without losing control of the services running on it.
We design and migrate network and hosting infrastructure for existing workloads and service dependencies. The design accounts for failure domains, security requirements and the responsibilities of the team that will operate it.
Discuss Your Infrastructure
Plan infrastructure change around the complete operating environment
Hosting and network changes affect more than servers and links. Applications, integrations, identity, data flows, monitoring, supplier boundaries, and operational procedures all influence whether a migration can be completed safely.
We establish the current architecture and the constraints around it before defining the target. That may mean retaining parts of the environment, moving workloads between data centres or hosting providers, improving resilience across sites, or introducing automation without replacing systems that remain fit for purpose.
A controlled architecture or migration programme can include:
- Current-state mapping of workloads, dependencies, and traffic paths to expose coupling and failure domains before change begins
- Target architecture for availability, security, and performance across on-premises, hosted, multi-site, and hybrid environments
- Phased migration and cutover planning with validation points, parallel operation where required, and tested rollback paths
- Network, access, and segmentation design covering routing, VPNs, firewalls, identity boundaries, and administrative access
- Repeatable infrastructure and deployment tooling to reduce manual variation and make future changes easier to review
- Documentation, runbooks, and operational handover so responsibilities remain clear after the migration is complete
If the environment is difficult to map or incidents cross several technical boundaries, technical investigation and operational diagnostics can establish the evidence needed before architecture decisions are made.
Technology follows the environment and ownership model
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Hosting & Virtualisation
OpenStack, VMware, Proxmox VE, XCP-ng
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Traffic & Connectivity
HAProxy, NGINX, WireGuard, IPsec, OpenVPN, CoreDNS, BIND
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Network Security & Access
nftables/iptables, pfSense/OPNsense, SSO, MFA, RBAC
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Deployment & Configuration
Terraform, Ansible, Docker
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Monitoring & Operational Evidence
Prometheus, Grafana, Loki/ELK
Infrastructure requirements that need architecture rather than a product choice
The appropriate design follows from service continuity, workload behaviour, supplier boundaries, operating capability, and the acceptable level of migration risk.
What the architecture needs to preserve and improve
Availability, security, performance, cost, and supportability are considered together. The design must account for the services already running and remain understandable to the people responsible for them.
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Controlled Network Boundaries
Segmentation and explicit access paths reduce exposure without obstructing legitimate service flows. -
High Availability Across Failure Domains
Provider, site, network, and host failures are addressed according to their actual service impact. -
Performance Based on Workload Evidence
Routing, latency, throughput, and capacity decisions are based on measured workload behaviour. -
Migration With Validation & Rollback
Each stage has entry criteria, checks, ownership, and a defined recovery route if results differ from plan. -
Capacity That Can Change Predictably
Scaling and placement follow documented processes rather than one-off infrastructure intervention. -
Clear Day-Two Ownership
Runbooks, configuration records, monitoring, and handover make the resulting environment supportable.
Design the target from the live environment
We do not begin with a preferred platform or a generic migration sequence. We establish what exists, which services and teams interact with it, what must remain available, and who will own the result.
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Current Environment & Constraints
We review infrastructure, network topology, workloads, integrations, access, monitoring, suppliers, and operational requirements. This establishes failure domains, hidden dependencies, and practical limits on change.
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Target Architecture & Migration Plan
We define the target state, migration stages, connectivity, security controls, validation criteria, rollback routes, and responsibilities against the organisation's budget, timescale, and operating capability.
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Build, Migrate & Verify
We prepare and test the environment, introduce changes in controlled stages, and use parallel operation where it materially reduces risk. Deployment and rollback tooling makes the process repeatable.
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Handover and Service Ownership
We provide architecture records, runbooks, operating guidance and knowledge transfer. Responsibilities for monitoring, maintenance, incidents and future changes are assigned as part of the handover.
High availability designed across a complete live service stack
Case study: High-Availability SIP Infrastructure for a Live Voice Service
An active/standby SIP service deployed across paired infrastructure in two data centres.
A UK communications provider needed standard SIP endpoints to work with an established voice platform. We built a paired SIP service stack with automatic failover, combining routing, call handling, media anchoring and real-time event translation behind stable virtual endpoints.
Custom checks covered process health, SIP traffic, active requests and sustained processing errors. A confirmed fault moved service to the standby automatically, allowing each deployed instance to fail and recover independently without replacing the backend PBX.
Architecture grounded in the services already running
We examine application, integration, data, identity, infrastructure, and supplier boundaries together. This prevents an infrastructure change that appears sound in isolation from causing disruption elsewhere.
Technology choices with ownership made explicit
Open-source and proprietary components are assessed according to fit, supportability, cost, constraints, and the control the organisation needs. The trade-offs are documented for future decisions.
Agree ongoing support separately from the migration
The primary objective is an infrastructure environment the organisation can operate. Documentation, tooling, monitoring, and knowledge transfer are therefore part of the architecture rather than deferred until after migration.
Where defined incident cover is required, SLA-Based Technical Support provides agreed response, coverage, and escalation. Engineering Support Hours are available for bounded investigation, maintenance, and improvement work.
Application-level changes can be handled through systems and API integration or existing and legacy system engineering where the infrastructure migration exposes requirements beyond the platform itself.
Frequently Asked Questions
Have a question about an infrastructure requirement? Tell us what needs to change.
Plan the infrastructure change around the services already running
We can review the current environment, identify the relevant dependencies and failure domains, and define a staged architecture or migration with validation, rollback, and ownership made explicit.
