Patrick Ball has spent more than twenty years conducting quantitative analysis for truth commissions, non-governmental organizations, international criminal tribunals, and United Nations missions in El Salvador, Ethiopia, Guatemala, Haiti, South Africa, Chad, Sri Lanka, East Timor, Sierra Leone, South Africa, Kosovo, Liberia, Perú, Colombia, the Democratic Republic of Congo, and Syria.

Patrick began working in the human rights field in El Salvador in 1991. From 1993 to 2003, he worked in several capacities in the Science and Human Rights Program at the American Association for the Advancement of Science, where he began recruiting colleagues to build HRDAG. From 2003 to 2013 he continued to develop HRDAG from within Benetech, a nonprofit technology company in Silicon Valley. From 2013 through 2015, Patrick was Executive Director of HRDAG; on December 1, 2015, he became the Director of Research.

Patrick provided testimony in two cases at the International Criminal Tribunal for the former Yugoslavia, the first in the trial of Slobodan Milošević, the former President of Serbia. He provided technical advice to the Special Court in Sierra Leone and the International Criminal Court. In 2013 he provided expert testimony in Guatemala’s Supreme Court in the trial of General José Efraín Ríos Montt, the de-facto president of Guatemala in 1982-1983. Gen. Ríos was found guilty of genocide and crimes against humanity; it was the first time ever that a former head of state was found guilty of genocide in his own country.

In September 2015, Patrick provided expert testimony in the trial of former President of Chad, Hissène Habré. HRDAG’s analysis showed that the death rate for political prisoners was much higher than for adult men in Chad: 90 to 540 times higher. On its worst day in the time period for which data were analyzed, the mortality rate was 2.37 deaths per 100 prisoners. During a nine-month period in 1986-1987, the mortality rate in Habré’s prisons was higher than that of US POWs in Japanese custody during World War II.

In 2015, the Claremont Graduate University awarded Patrick a Doctor of Science (honoris causa). In 2014, Patrick was elected a Fellow of the American Statistical Association. In  2005, the Electronic Frontier Foundation awarded Patrick with their Pioneer Award. In June 2004, the Association for Computing Machinery (ACM) gave him the Eugene Lawler Award for Humanitarian Contributions within Computer Science and Informatics, and in 2002, he received a Special Achievement Award from the Social Statistics Section of the American Statistical Association. He is a Fellow at the Human Rights Center at Berkeley Law of the University of California-Berkeley; and a Research Fellow at Carnegie Mellon’s Center for Human Rights Science. He has been profiled by The New York Times Magazine, Wired, Foreign Policy,, and the Christian Science Monitor, and he has been featured in a PBS film.

Patrick received his bachelor of arts degree from Columbia University, and his doctorate from the University of Michigan.

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