Cairn Sovereign Security

Sectors

Who we work with

We work where the cost of losing control is highest.

01 Primary

Government & Defence

Central government departments and defence-industrial suppliers with strict data-residency, supply-chain, and assurance obligations. Work aligned to the NCSC Cyber Assessment Framework.

Sovereignty here is not a preference — it is a requirement, and open foundations are how we prove it.

02 Secondary

Private Clients

Organisations and individuals for whom a breach is a reputational or personal catastrophe: top-tier law firms, family offices, high-net-worth individuals, and media organisations protecting sources.

Discretion is the deliverable. We operate quietly, host tightly, and leave you owning everything.

03 Representative engagements

We do not name clients. The following are representative, anonymised descriptions of the kinds of organisations we work with.

i

A UK central government department

Estate monitoring and 24/7 detection, hosted to departmental residency requirements.

ii

A top-10 UK law firm

Perimeter redesign and hardening-as-code across a multi-site estate.

iii

A defence-industrial supplier

CAF readiness and supply-chain assurance ahead of a prime contract.

iv

A family office

Discreet managed detection with a deliberately small operational footprint.

They showed us the detection rules on the second day. No other supplier had offered, and one told us it wasn't possible.

Head of Cyber Security, a UK central government department

The handover documentation was the part that convinced the board. We could run it ourselves. We have chosen not to.

Chief Operating Officer, a top-10 UK law firm