Projects

The work,
in practice.

Three active tools. One mission — reducing the frequency, severity, and human cost of global risk through advanced technology and rigorous analysis.

Meridian's products are named for people who used knowledge and institutions to make the world more stable — Cronkite, Snow, Marshall — and the work ahead.

Active Portfolio

Three tools.
Three problems.

Epistemic Infrastructure
AI · Five-Model Ensemble
Chrome Extension
REST API · SQLite
Real-time Scoring
Named for
Walter Cronkite — the most trusted man in America. Because trust in information has to be earned, measured, and maintained.
Cronkite ↗
Epistemic scoring for the modern information environment
A real-time epistemic scoring system for any web content. Five independent AI models evaluate articles, social media posts, and documents across five dimensions — validity, reliability, value, transparency, and provenance — and aggregate into a single interpretable trust signal. A crowdsourced domain trust database builds itself through normal browsing: the first person to read an article scores it for everyone who follows. The ambient immune system the information environment has never had. Addresses one of the most-ranked global risks two years running.
Active · v0.8
Risks Addressed
Misinformation & Disinformation · Societal Polarization · Adverse Outcomes of AI · Online Harms
Open-Source Threat Surveillance
AI · NLP
News Feed Aggregation
Signal Detection
Early Warning Systems
Named for
John Snow — father of epidemiology, who mapped the 1854 Broad Street cholera outbreak from public data alone. The original open-source threat surveillance.
Snow ↗
Open-source surveillance for non-traditional combat threats
An AI-driven open-source intelligence tool that monitors global news and media feeds to detect and track non-traditional combat threats — infectious disease outbreaks, CBRN incidents, humanitarian crises, and civil unrest — before they escalate beyond the point where institutional response can be preventive rather than reactive. Snow reads what the world is publishing and extracts the signal from the noise. Built on the principle John Snow proved in 1854: the information required to anticipate most global threats is already publicly available. It simply requires the right instruments to surface it in time.
Active · Beta
Risks Addressed
Infectious Diseases · CBRN Weapons & Hazards · State-based Armed Conflict · Involuntary Displacement · Societal Polarization
Country Risk Intelligence
AI · Data Synthesis
Multi-source Aggregation
Risk Modeling
Dashboard · API
Named for
George Marshall — who used strategic intelligence and institutional resources to rebuild a broken world. Risk assessment in service of resilience.
Marshall ↗
Living country risk scores across a structured global risk taxonomy
A continuously updated country risk scoring system that assesses national vulnerability across a structured subset of recognized global risk categories. Where most global risk reports are annual snapshots, Marshall is a living intelligence product — updated as conditions change, calibrated across economic, geopolitical, environmental, technological, and societal dimensions. Built for policy makers, NGOs, researchers, economists, and institutional decision-makers who need a rigorous, transparent, and current picture of where global risk is concentrating and why.
Active · Beta
Risks Addressed
Cross-cutting · Geoeconomic Confrontation · State Fragility · Infectious Diseases · Climate Change · Institutional Resilience
The Portfolio Logic

Three tools.
One stack.

Cronkite
Epistemic Quality
Ensures the information feeding decisions meets rigorous sourcing and reliability standards. The foundation layer — before you can act on information, you need to know whether to trust it.
Snow
Threat Detection
Monitors the global information environment for early signals of emerging non-traditional threats. Converts open-source noise into actionable early warning — before crises become catastrophes.
Marshall
Risk Intelligence
Synthesizes threat signals and structural data into living country risk scores. Tells decision-makers not just what is happening, but where risk is concentrating and what institutional response looks like.
The Work Ahead

The bearing
points forward.

Cronkite, Snow, and Marshall address the epistemic and intelligence layers of global risk. The longer-term Meridian technology agenda points toward a more ambitious application — decision support infrastructure for the full spectrum of actors who face global risk under conditions of high uncertainty and time pressure.

"The same architecture that enables rapid decision-making at scale in a defense context can enable rapid decision-making at scale in a humanitarian context. The variable is not the technology. It is who it serves, and what it is asked to do."

Meridian is developing a long-term research and technology agenda around decision support infrastructure for non-military actors — NGOs, economists, policy makers, researchers, physicians, and international organizations — operating under the same conditions of urgency and uncertainty that advanced defense systems are built to address. Details will be published as the work matures and conditions permit.

Named for James Madison — architect of institutional checks and balances, and the Madisonian belief that human potential is best realized through well-designed institutions rather than despite them. The right name for a tool designed to extend the benefits of advanced decision support to the full spectrum of human need.

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.