Security advisory for complex and critical environments

Trusted experts in bespoke security advisory for mission-critical systems and infrastructure.

Services

Some of the services we offer

From large-scale manufacturers to small businesses, we're dedicated to helping a wide range of industries thrive.

Security Strategy Training Incident Response M&A Due Diligence Architecture Virtual CISO Penetration Testing Custom Development OT & ICS Security IACS UR E26/27 Compliance CSIRT & SOC Advisory Security Strategy Training Incident Response M&A Due Diligence Architecture Virtual CISO Penetration Testing Custom Development OT & ICS Security IACS UR E26/27 Compliance CSIRT & SOC Advisory

Industries

Our specialist industries

Custodiae specialises in discreet and effective cyber security solutions and advisory for mission-critical systems and infrastructure where failure is not an option.

Maritime

Safeguarding shipping, ports, and offshore operations from emerging cyber threats.

Industrial

Protecting critical infrastructure and manufacturing from advanced attacks.

Defence

Advising military and security organisations on confidential risk and cyber resilience.

Why choose us

Our strengths

Discreet solutions

Security shouldn't be complex. Our solutions and advisory seamlessly complement your existing operating procedure.

Multi-domain expertise

With expert advisors experienced across multiple domains — within government, military, and commercial — no matter the project, Custodiae is able to advise.

International experience

Whilst Custodiae is based in Tokyo, it has advisors based around the globe. We are able to tackle challenges whether they are technical — or cultural.

Technical ability

Our advisors are not only certified to top industry standards, but have a wealth of experience working for some of the world's biggest government and private organisations.

About

Security where it really matters

Custodiae specialises in critical infrastructure and supply chain security and thrives when operating in complex environments.

By combining deep expertise in infrastructure-focused security with a commitment to practicality and reliability, Custodiae serves as a trusted partner for organizations navigating the complexities of modern cyber threats. Whether protecting sensitive data or ensuring operational resilience, Custodiae is dedicated to delivering effective, straightforward solutions that meet the demands of today's digital world.