UK Sovereign · Defence · Government · CNI · Est. 2003
Secure foundations for theUK's most critical missions.
TIS has designed, secured and operated mission-critical digital services since 2003 — for defence, government, critical national infrastructure and the industries the UK depends on.
Who we are
Some workloads can't fail, can't leak and can't leave the country. That is where we work. TIS is a UK sovereign consultancy: secure architecture, zero trust, secure cloud and assurance — proven across two decades, from open source to the highest classification systems.
Capabilities
Built for the workloads that matter most
Nine disciplines, one standard: everything we deliver is documented, evidenced and ready for inspection.
Advisory & Consulting
Enterprise and security architecture, digital enablement and computer forensics — honest counsel from people who have delivered internationally for two decades.
Learn moreSecure Architecture & Zero Trust
Architecture that assumes breach and proves control — designed to a level capable of supporting the highest government and defence classifications.
Learn moreSecure Cloud Infrastructure
UK-controlled cloud for workloads that cannot compromise on jurisdiction — sovereign landing zones, DCS expertise and resilience designed in.
Learn moreCyber Assurance & Testing
Penetration, web, wireless, mobile, phishing and red-team testing — run to a transparent 11-step methodology that stands up to inspection.
Learn moreCyber Essentials
Certification support for the UK government-backed scheme — walk-through or self-serve, including Cyber Essentials Plus testing.
Learn moreResilience & Continuity
Planning for the day things go wrong: continuity strategy, disaster recovery, high availability and exercising across systems, sites and suppliers.
Learn moreNetwork & Infrastructure
Networks engineered for uptime, capacity and protection — audited, documented and monitored so inspection finds nothing to question.
Learn moreManaged IT Services
Day-to-day IT operated by qualified, certified engineers — including satellite communications for the world's most remote operating environments.
Learn moreSoftware Engineering
Bespoke, secure applications — from GIS and sonar systems to premium finance platforms. We don't just build applications; we secure them.
Learn moreTIS // SECURE CLOUD & ZERO TRUST
A UK region is not sovereignty. Jurisdiction, control and evidence are.
We design and build secure cloud infrastructure for organisations that cannot compromise on jurisdiction — sovereign landing zones, DCS and ZTA expertise, and resilience designed in from the first diagram. Cloud migration and management have been part of our delivery for years; this practice takes them to high-assurance standard.
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Sectors
Where we work
Two decades across the UK's most demanding sectors — and some of the world's most challenging environments.
Defence
A long pedigree in highly secure systems — from open source through to complex, high-classification programmes.
VIEW SECTOR →Government
Designing and building systems that work across central government, its departments and agencies.
VIEW SECTOR →Critical National Infrastructure
Energy, water, transport, health. Where operational technology meets national resilience, the architecture has to hold.
VIEW SECTOR →Aviation
MRO, fleet planning, flight control and pilot scheduling — exemplary delivery across aviation operations.
VIEW SECTOR →Energy & Offshore
From GIS to sonar to satellite communications — delivering into some of the most challenging global environments.
VIEW SECTOR →Insurance & Finance
Simplifying regulated business: quoting systems, premium finance platforms and the processes behind them.
VIEW SECTOR →Why TIS
Built for scrutiny
Proven, not promised
Formed in Bristol in 2003. Hundreds of customers across six sectors, served from three UK offices — a track record most challengers can't match.
Sovereign by design
UK-owned, UK-based, UK jurisdiction. Your data, our people and every decision stay in the country.
Cleared for the hard problems
A long pedigree in highly secure systems — from open source through to the highest classification levels.
Honest counsel
We will never over-specify or recommend technology you don't need. It's been our way of working for twenty years.
Market context
Sovereign demand is structural, not cyclical
Estimated UK sovereign cloud market, 2026
MOD commitment to a UK sovereign, air-gapped defence cloud
of UK business leaders actively looking to repatriate data to UK shores
TIS has spent two decades building capability where that demand lands. Partners & Investors →
Insights
Briefings from the practice
Why a UK region is not a sovereign cloud — and what buyers should ask instead
TIS-BRF-002 · Secure by DesignSecure by Design, three years in: what accreditors actually look for
TIS-BRF-003 · Zero TrustZero trust for critical infrastructure: assume-breach where downtime isn't an option
Contact
Start a conversation in confidence.
No forms to qualify you, no sales sequence. Tell us what you're carrying and we'll tell you honestly whether we can help.
Contact TIShello@tisglobal.co.uk · 07385 292925 · London · Cheltenham · Corsham