Bogotá, Colombia · Tuesday, 20 October 2026
David TarazonaJournalist · Due diligence · Bogotá · GMT−5
Bogotá, Colombia · Available for remote work worldwide
Thirteen years of cross-border investigations — the Paradise Papers, Odebrecht, conflict minerals — now pointed at markets, supply chains, and the systems that publish the findings.
Reporting that ran in El Espectador, Mongabay, La Marea, OneWorld and Cuestión Pública.
Independent English-language coverage of equities, macro and congressional trading — a hundred posts built the way I build an investigation: SEC filings, 13F positions and insider-transaction data read from the record, then written in plain English. Published at FinTara and syndicated to InsiderFinance Wire on Medium.
EnglishEquitiesMacroSEC filingsCongressional trading
Part of the Paradise Papers’ 100-outlet global consortium. I worked the Colombian slice of the leak: offshore structures tied to Ecopetrol, to then–Defence Minister Gabriel Silva Luján, and to the circle around President Juan Manuel Santos. The findings ran in El Espectador and in the consortium’s public database.
ConnectasOffshore financeBeneficial ownershipCross-border
Berkshire’s quarterly filing read from the record — what the $10B Alphabet build-up and the Visa exit say about how the position is actually being managed.
13F filingsBerkshirePosition analysis
Congressional trading tracked through the filings — STOCK Act violations piling up as the ban debate returns to the floor. The accountability beat, applied to markets.
Congressional tradingSTOCK ActFilings
Insider-transaction signals decoded for professionals outside the US market — the bridge piece between the English desk and its Spanish-speaking readers.
SEC Form 4Insider transactionsExplainer
Co-founded the outlet and built its editorial strategy, content systems and social desk — 143,000 followers across 5,238 posts. The work covered Odebrecht, congressional asset disclosures and organised crime across two administrations.
Co-founderEditorial systemsAudience4 awards
Reported and edited long-form environmental investigations for Mongabay’s Spanish-language desk — deforestation, extractive industries and biodiversity loss across Colombia and the wider region.
Environmental reportingLong-formSpanish / English
Grant-funded investigation into the European Investment Bank’s financing of the Olkaria geothermal project and the displacement of Maasai communities around it. Published in La Marea (Spain) and syndicated across European outlets.
JournalismFund.eu grantDevelopment financeField reporting
Part one of a four-part investigation into the European Investment Bank — a lender almost nobody has heard of, behind a line of flagpoles in the Grand Duchy, whose appetite for electricity “at all costs” reshaped a Kenyan valley. Reported with Adriana Homolova and Laurence Soustras under a JournalismFund.eu grant.
Development financeEIBLuxembourgCross-border
The UNICEF count is 145 million girls and women cut — and the practice is not only African: new evidence put it in Iran, the Gulf and Southeast Asia, and in the immigrant communities of Europe. Then to Kenya’s Loita Hills, where the Maasai are testing an alternative rite of passage: the ceremony intact, the knife gone. Full text kept as a PDF.
FGMUNICEF dataKenyaGlobal health
Registry work, leak analysis and network mapping — the file behind the story.
2022
Reconstructed the authorisation chain behind the Ruta del Sol bribes from SIC Resolution 67837 — shell-company flows, Grupo Aval executives, and the then–attorney general’s position in the network.
Cuestión Pública
2021
A World Bank / IFC infrastructure project where the senior investment officer was married to the vice-president of the consortium that won the bid. Registries and filings documented the institutional failure.
Cuestión Pública
2020
Profiles of Colombian legislators built from public registries, campaign-finance databases and corporate records — family business networks, Panamanian holdings, property history, undisclosed conflicts.
Cuestión Pública
2019
Historical due diligence on a real-estate transaction between a future head of state and an associate of the Ochoa Vásquez cartel, rebuilt from property registries, law-enforcement records and biographical sources.
Cuestión Pública
2022
How a former first family’s rural estate became a large-scale urban development: land-registry changes, agency approvals and the conflicts of interest that never appeared in the file.
Cuestión Pública
Earlier bylines: Colombiacheck (fact-checking, 2017) and OneWorld (data journalism, Amsterdam, 2015). Longer due-diligence reports and references on request.
What I build when I’m not chasing a document.
Independent EN/ES coverage of equities, commodities and macro — plus the research desk behind it: a multi-agent pipeline that scouts, checks sources, drafts and publishes on a self-hosted VPS. A fundamental-data screener is in development, built on Sharadar and DuckDB.
PythonDockerLLM orchestrationDuckDBParquet
One-to-one coaching for senior Colombian executives, engineers and technical leaders — curriculum built on journalistic editing rather than textbook drills. I also design and teach an OSINT methodology course for working investigative journalists.
Curriculum designC-suiteOSINT teachingESL
Reporters and analysts do the same thing: read the file until it gives something up.
I started in newsrooms in Bogotá, went to Amsterdam to learn data journalism with OneWorld, and took an MA in Data Journalism at Tilburg University on a full merit scholarship. In 2017 I worked the Colombian side of the Paradise Papers alongside Connectas and El Espectador.
In 2018 I co-founded Cuestión Pública and spent seven years building it — editorial strategy, the systems that produced the reporting, and the social desk that carried it to 143,000 people. Its investigations went on to win the Premio Rey de España, the Premio Simón Bolívar, the Premio CPB and the SIP award.
Now I work where the two halves meet. Due diligence for people who need to know who is actually behind a company. Market research in two languages. And AI pipelines built so that the evidence — not the model — decides what gets published.
Method Documents first, narrative second. If it isn’t in the record, it isn’t in the story.
Open to new work
Investigative reporting, due diligence, bilingual market research, or an AI research desk that needs an editor with a spine.
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