Specialist IT Consultancy · London, UK

Architecture, security, and transformation — for organisations where failure is not an option.

Krisol Ltd is a senior-led IT consultancy with over two decades of experience designing, securing, and modernising critical infrastructure for Government, Finance, Manufacturing, and global service providers.

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20+ Years Experience

SC-Cleared Capability

HLD Through to Delivery

Vendor-Neutral Advice

Government & Enterprise

What we deliver

Services built
around outcomes.

We don't sell technology — we solve problems. Every engagement begins with your operational context and ends with measurable results. From initial architecture through to full lifecycle delivery, we own the technical work so your teams don't have to.

Network Architecture
& Transformation

Enterprise network design from strategy through to delivery. HLD and LLD documentation, CAB/TDA engagement, multi-vendor implementation, BoM creation, and full lifecycle ownership — including peer review and design authority coordination.

Cloud & Infrastructure
Consulting

Cloud-first architecture for Azure and AWS environments. Hybrid connectivity, VPN gateway design, migration planning, and infrastructure modernisation at enterprise scale. We design for resilience, security, and operational simplicity — not just cloud-native fashion.

Cybersecurity &
Risk Reduction

Firewall governance, SIEM design and implementation, and compliance-aligned security architecture across Checkpoint, Palo Alto, and Cisco platforms. Security embedded from the first design decision, not bolted on at the end.

Automation &
Operational Efficiency

Network and infrastructure automation that eliminates configuration drift, reduces manual overhead, and enables consistent, repeatable operations. We identify where automation delivers real value — and build it to last.

Technical Assurance &
Design Review

Independent architectural review and peer assurance. We verify designs against requirements, stress-test assumptions, and ensure solutions are fit for purpose before commitment. Particularly valuable for regulated environments and high-stakes programmes.

Managed Consulting &
Ongoing Advisory

Retained senior advisory for IT directors, CIOs, and programme teams navigating complex technology decisions. We provide continuity, institutional memory, and hands-on support across the full technology lifecycle.

Sectors

Trusted across
critical industries.

Government & Defence

SC-cleared delivery for MoD, Defence Digital, and public sector programmes. Secure architectures, datacentre migrations, and cyber-hardened infrastructure for environments where security is non-negotiable.

Finance & Banking

FCA-grade secure networks, firewall governance, and compliance-aligned design. Datacentre upgrades and cloud integration for regulated financial organisations that cannot afford downtime or data exposure.

Manufacturing & Industrial

Resilient, low-latency networks for operational technology environments. Secure remote access, industrial automation connectivity, and enterprise networking for distributed manufacturing sites.

Global IT Service Providers

Scalable multi-vendor solutions — next-generation firewalls, SD-WAN, cloud network fabrics, and global VPN architectures — for Tier 1 technology organisations requiring architectural depth and delivery rigour.

Why Krisol

Senior expertise.
No layers
in between.

We are a boutique practice. That means the people who scope your engagement are the people who deliver it — bringing two decades of hard-won experience directly to your programme.

Senior-level engagement throughout

Every engagement is led by principals with decades of hands-on experience. We do not delegate complex work to junior staff. What you scope is what you get.

ii.

Vendor-neutral advice

We are not resellers, VARs, or tied to any technology vendor. Our recommendations are based on your requirements, not our commercial relationships.

iii.

Secure by design

Security is embedded from the first architecture decision. We don't retrofit security to existing designs — we build it into every layer from the outset.

iv.

Strategy through to delivery

We bridge the gap between strategic planning and technical execution. We produce the documentation, engage the governance bodies, and see the work through to completion.

Clear documentation & governance

Every engagement produces structured, maintainable documentation. CAB submissions, HLDs, LLDs, BoMs, and runbooks — written to the standard your organisation actually requires.

vi.

Automation-first thinking

We design with automation in mind from day one — reducing operational burden, eliminating human error, and building infrastructure that scales without proportional headcount growth.

Delivery approach

How we work.

Discover

We begin with a structured discovery — understanding your environment, constraints, risk profile, and objectives before proposing any solution.

Design

Architecture and detailed design produced with full documentation — HLD, LLD, BoM, and governance artefacts tailored to your organisation's standards.

Deploy

Hands-on implementation with senior oversight. We coordinate vendors, manage change control, and maintain accountability throughout delivery.

Sustain

Ongoing advisory, knowledge transfer, and operational support — ensuring your investment performs as designed long after initial delivery.

Selected work

Case studies.

Start a conversation →

Government & Defence · Architecture

Central Government — Defence & Security

Next Generation Communication Network

Produced HLDs, strategic roadmaps, and architectural governance documentation for a major defence programme. Peer-reviewed cross-domain architectures across highly sensitive, classified environments to government security standards.

Energy · Cloud

UK Energy Sector — Nuclear

Azure Migration & Network Modernisation

Cloud-first network design, VPN gateways, firewall upgrades and multi-vendor site-to-site integration across a regulated nuclear energy environment.

Finance · Cybersecurity

UK Financial Services Regulator

Secure Datacentre Transformation

ExaCC design, VDI migration, SIEM upgrades, and secure firewalls (Checkpoint, Palo Alto, Cisco) delivered to FCA-grade compliance standards.

Government · Infrastructure

Central Government — Identity & Border Services

AWS-Integrated Site Build

Two new sites architected from scratch. Full network lifecycle delivery, firewall modernisation, and secure AWS cloud connectivity for a Home Office agency.

Client feedback

What clients say.

The technical depth Krisol brought to our network design programme was exceptional. They navigated our governance process with precision and delivered documentation that genuinely held up to scrutiny at design authority level.

Head of Infrastructure

Central Government Department

What set them apart was the combination of strategic thinking and hands-on delivery. They designed the architecture, wrote the BoMs, engaged the vendors, and saw it through. That continuity made a real difference to the outcome.

IT Director

Financial Services Organisation

Krisol understood our operational constraints from day one. Their cloud migration design was clean, well-documented, and genuinely improved our resilience posture — not just a lift-and-shift exercise dressed up as transformation.

Network Architecture Lead

Global IT Service Provider

The firm

Cisco Palo Alto Checkpoint Azure AWS Juniper SD-WAN SIEM HLD / LLD SC-Cleared

Bringing the
world closer
through technology.

Krisol Ltd is a specialist IT consultancy founded on the belief that complex technology challenges require senior, experienced practitioners — not managed service templates or junior delivery teams.

With over two decades of hands-on experience across Government, Defence, Finance, Manufacturing, and Global IT Service Providers, we have delivered some of the UK's most technically demanding network architecture, cloud transformation, and security programmes.

We are a small, deliberate practice. We take on engagements where our expertise will make a material difference — and we decline work that we are not the right fit for. That discipline is why our clients return.

Experience

20+

Clearance

Approach

HLD → Live

Orientation

Outcomes

Get in touch

Let's discuss
your challenge.

Most engagements begin with a straightforward conversation. We're happy to discuss your situation in confidence — no obligation, no sales process. Just a direct conversation with a senior practitioner.

Email info@krisol.co.uk

Website krisol.co.uk

Service area UK & International

All initial consultations are handled directly by a senior principal. We work on a limited number of engagements at any one time to ensure the quality of attention your programme deserves.

Full name

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Organisation

Area of interest

Brief overview