Trusted by design
Practical stewardship of critical technology and services
Rhumb Line Holdings is a privately held firm focused on long-horizon, sovereign technology and services. We emphasise measurable security, operational transparency, and responsible governance across the projects we own and support.

Operating principles
- Security by default, simplicity in implementation, and continuous verification.
- Transparent governance, clear accountability and auditable processes.
- Preference for sovereign capability and alignment with applicable regulatory settings.
- Build only where we add durable value. Partner where that best serves the mission.
About
Rhumb lines are constant-bearing paths used in navigation. They trade the shortest route for a predictable one. That’s how we operate: steady, measurable progress on work that matters.
Contact
For enquiries, partnerships or due diligence requests:
Email: [email protected]
United States: 2121 Avenue of the Stars, Suite 800, Century City, CA 90067
Australia: ABN 37 669 848 348