• Co-founder of the World Islam Study Enterprise
• Brother of Palestinian Islamic Jihad founder Fathi Shiqaqi

Khalil Shiqaqi was a founding member – along with Sami Al-Arian, Mazen al Najjar, and Ramadan Abdullah Shallah – of the World Islam Study Enterprise (WISE). WISE was an Islamic think tank that sponsored events around the United States featuring speakers like Sheik Omar Abdul Rahman, who was later convicted for his role as the mastermind of the 1993 bombing of the World Trade Center. WISE was shut down in 1995 after some of its founders were arrested for ties to terrorism or were deported.

Shiqaqi is the brother of Fathi Shiqaqi, the founder of Palestinian Islamic Jihad, which is responsible for killing over 100 people in Israel. Fathi Shiqaqi was assassinated by Israel in 1995.

Khalil Shiqaqi now owns the Palestinian Center for Policy and Survey Research and is an associate professor of political science at Bir Zeit University.