Security Architecture Design & Review

Security architecture is the foundation everything else rests on. Flat networks, overly permissive firewall rules, standing administrative access and legacy perimeter-based designs are among the leading causes of successful breaches, and most of them are entirely preventable.

Our security architects review your existing design, identify the structural weaknesses that tactical tooling cannot fix, and produce a prioritised roadmap that strengthens your defences without demanding a rebuild or a bottomless budget. Most engagements move from review to an agreed improvement plan inside four to six weeks.

• Network segmentation and micro-segmentation strategy
• Zero trust architecture design and implementation planning
• Cloud security architecture review across Azure, AWS and Google Cloud
• Identity and access management architecture, including Entra ID and Active Directory
• Firewall, VPN and perimeter security review
• Defence-in-depth layering and control mapping to CIS v8 and ISO 27001

This is particularly valuable after a cloud migration, following an acquisition or merger, when preparing for ISO 27001 or Cyber Essentials Plus, or when a penetration test has surfaced issues that feel structural rather than isolated.

A review establishes what your target architecture should look like, what stands between you and it, and what order to close the gaps in. Because it addresses design rather than individual vulnerabilities, the benefit compounds. Every system built afterwards inherits the segmentation, access model and logging standards the review defined, which is why organisations that invest here tend to see fewer repeated findings in later penetration tests.

From current-state assessment to a prioritised improvement roadmap, typically delivered in four to six weeks.

1. 01

   Weeks 1-2, Discovery & Documentation Review

   we gather architecture documentation, diagrams and policies, then analyse topology, firewall and ACL rules, cloud configuration, and privileged and remote access.

2. 02

   Weeks 3-4, Gap Analysis & Risk Assessment

   architectural weaknesses are identified, scored and prioritised, benchmarked against CIS v8 and ISO 27001 controls, with quick wins flagged where risk can be reduced immediately at little cost.

3. 03

   Weeks 5-6, Roadmap & Recommendations

   a technical report, sequenced improvement roadmap, reference architecture designs and an executive presentation suitable for the board, plus an optional walkthrough with your IT provider or MSP.

If your question is not covered here, a consultant will answer it directly, with no sales script.

Do we need to replace our existing security tools? Rarely. Most architecture gaps are configuration, segmentation and identity problems rather than product gaps. We recommend changes to design and configuration first, and only then discuss tooling, so you are not sold licences you do not need.

How disruptive is a redesign? The roadmap is sequenced so controls can be implemented without business interruption. Quick wins land early and structural changes are planned around your change windows and operational calendar.

Can you work with our cloud provider or MSP? Yes. We regularly deliver alongside managed service providers, supplying the architecture and prioritised guidance while they implement and operate the controls, with clear ownership boundaries agreed up front.

How does this support ISO 27001? The review maps your current and target architecture against ISO 27001 Annex A controls and CIS v8 benchmarks, giving you documented design decisions and evidence for the certification audit.

What does a review cost? Scope and cost are agreed in writing before work starts. A focused review of a single environment is typically delivered in four to six weeks, with fixed-price options available for well-defined scopes.