Giannina Segnini, Costa Rica and United States, is the director of the data journalism degree at the Journalism School at Columbia University in New York. She also leads the Columbia Journalism Investigations, a team of post-graduate fellows who investigate cross-border collaborative stories using data.

Before joining Columbia University, Segnini led the team of computer scientists and investigative reporters who developed ICIJ's Offshore Leaks application. Her team processed the data and developed the interactive application for the 2013 Offshore Leaks database. She also participated in ICIJ’s Panama Papers project.

In 1994, she founded and directed the data-investigative team at the newspaper La Nación in Costa Rica, where she worked until 2014.