Phares has testified before committees of the U.S. State, Justice, Defense and Homeland Security and the United States Congress. He briefed and testified to international bodies like the European Parliament and the United Nations Security Council on matters related to international security and Middle East conflict. He serves as an adviser to the Anti-Terrorism Caucus in the U.S. House of Representatives since 2007 and is a co-secretary general of the Transatlantic Legislative Group on Counter Terrorism, a Euro-American Caucus, since 2009.