Arjun Sethi is a writer, attorney, and professor based in Washington, D.C. He is a frequent commentator on civil rights and civil liberties related issues, and teaches courses on surveillance, profiling, and counter terrorism. His work has appeared in numerous national outlets, including CNN, The Guardian, USA Today, and The Washington Post, and he has been widely quoted in print, radio and television, including by The New York Times, The Independent, BBC America, BBC World Radio, and NPR. In addition to his media work, he is also a consultant and advises foundations, nonprofits, and advocacy groups on rapid-response policy analysis, public education and community organizing campaigns, and solidarity work with various movements. He previously served as national legislative counsel for human rights and national security related affairs at the American Civil Liberties Union. He presently serves as Co-Chair of the ABA's National Committee on Homeland Security, Terrorism, and Treatment of Enemy Combatants.

In August 2018, Sethi published American Hate: Survivors Speak Out, which chronicles the stories of individuals affected by hate and describes how the bigoted rhetoric and policies of the Trump administration have intensified bullying, discrimination, and even violence toward them and their communities.