Meridian builds the same class of advanced technology now reshaping modern defense — AI systems, open-source intelligence, country-risk modeling, sensor and surveillance platforms — and applies it to the threats that have always done the most damage to human populations and have always received the least serious technological investment.
Meridian belongs to the same category as the institutions building the technological backbone of modern defense. The category is real; the threats it can address are wider than how it has historically been used.
For most of the modern era, the phrase defense technology has meant systems built to project force or counter adversaries who project it. That work is legitimate, important, and well-resourced. It is not, however, the limit of what advanced technology can defend against.
The threats that have killed the most people in the past half-century have rarely been adversary military forces. They have been pandemics, famines, mass displacement, environmental collapse, information failure, institutional breakdown, and the cascading consequences of all of these. These are the threats that the most authoritative annual review of global risk has been documenting for two decades. They receive a small fraction of the technological investment that goes into adversary-focused defense.
Meridian was founded on a simple working observation: the architectural seriousness applied to projecting force can be applied, with equal seriousness, to protecting populations. Same class of tools. Different threat surface. Different theory of who the customer is and what success looks like.
This makes Meridian a defense technology institution by category and an unusual one by orientation. Same tools as Palantir, Anduril, and the rest of the modern defense-tech category — built for the institutions whose mandate is protection.
These are not abstract concerns. Each is a documented and growing source of human suffering. Each is also a problem where modern technology — applied with discipline — can materially reduce the frequency, severity, and human cost. Meridian's products map directly to this threat surface.
Meridian's natural customers are the organizations whose work is keeping people, populations, and systems safe — and the parts of defense and intelligence whose mission is genuinely defensive. The shared characteristic is mandate. Meridian builds for institutions whose success is measured in lives protected, crises averted, and risks reduced — not in adversaries deterred or targets engaged.
“The institutions that protect human populations are doing their work with last generation’s tools. The institutions that project force have the current generation’s tools and the budgets to keep up. Meridian exists because the gap between those two facts is the most consequential and most addressable problem I know how to work on.”
Meridian is the work of one principal investigator, supported by a deliberately modern toolchain. The arguments above are not a prospectus for an organization I one day hope to build. They are the working premises of the institution I am operating now, with the products listed under Projects already shipping or in active development.
If your organization works on global-risk problems and you see a fit, the contact page is the right place to begin a conversation. Meridian considers all serious inquiries from humanitarian, multilateral, public health, defense-protective, and academic institutions.
— Mark Greenhalgh, Ph.D., MPH
Founder · Principal Investigator
Meridian is the independent research and applied-technology project of Mark Greenhalgh. Views, analysis, and materials published under the Meridian name are his own and do not represent the position of the U.S. Department of Defense, the Department of the Army, or any U.S. government agency or component. Meridian operates independently of his official duties.