[1][3] Khalil received a degree in law from the American University of Beirut.
[1][4] He was named as the ambassador of Lebanon to the Federal Republic of Germany in October 1978 and remained in office until July 1983.
[1] During his diplomatic post in Iran Khalil closely worked with Shah Mohammad Reza Pahlavi.
[5] One of their collaborative activities was to curtail the popularity of Musa Al Sadr, a powerful Lebanese Shia figure.
[6] Khalil is among the signatories of a document protesting the sectarian approach of two Shia political groups, Amal and Hezbollah.