Malachy specializes in Visual Investigations, a new form of accountability and explanatory journalism that combines traditional reporting with advanced digital forensics, such as collecting and parsing information from large volumes of videos, photos and audio, analysis of satellite imagery and 3-D reconstructions of crime scenes. Malachy has led investigations into Russian airstrikes on hospitals in Syria, the Las Vegas mass shooting, chemical weapons attacks in Syria, extra-judicial military shootings in Nigeria, the Saudi officials who killed journalist Jamal Khashoggi in Turkey, and the killing of a young Palestinian medic along the Gaza-Israel border. These stories have been recognized with several awards including a Pulitzer Prize and George Polk Award. Prior to joining The Times in 2016, Malachy worked as a reporter and editor at Storyful and Reported.ly, two social journalism startups; at Village, a current affairs magazine in Ireland; and as a computer programmer.