Shaheen was born to Albert and Aileen Shaheen in Danbury, Connecticut; his grandfather came to the United States from Lebanon in 1898. He attended St. Peter Grammar School and Danbury High School before entering the Latin Church in Bloomfield in 1955. In 1958, he transferred to the Eastern rite in Methuen, Massachusetts, while attending classes at St. Anselm College in Goffstown, New Hampshire. After being ordained a subdeacon and deacon, Shaheen was ordained a priest by Bishop Francis Mansour Zayek on May 2, 1964, at the Basilica of the National Shrine of the Immaculate Conception. Shortly after his ordination, he became pastor of St. Raymond's Church in St. Louis, Missouri, which had then been without a resident priest for over 20 years. Under his leadership, St. Raymond's went from just a few faithful parishioners using a four-family apartment to a cathedral with hundreds of active families. From 1965 to 1970, he organized and celebrated Maronite liturgies on regular basis. He also developed newsletters, bulletins, and fliers; conducted a census to identify Maronites in the greater metropolitan area; and introduced spiritual and cultural programs, including Maronite religious education classes. He hosted in 1970. Kicking-off a fund drive for new church in 1971, he later dedicated a new church in November 1975 and a new rectory in February 1977. He was ordained an archpriestin September 1978, and dedicated a new parish center "The Cedars" in November 1979. On March 31, 1986, Shaheen was ordained a Chorbishop by Archbishop Zayek. He purchased additional property and buildings for future development as a Maronite retirement center and cultural center in 1991, and again hosted the National Apostolate of Maronites Convention in 1995. On December 5, 2000, Shaheen was appointed Eparch of the Eparchy of Our Lady of Lebanon by Pope John Paul II, following the retirement of Our Lady of Lebanon's first bishop, John George Chedid. He was consecrated a bishop on February 15, 2001 by Nasrallah Boutros Sfeir, the Patriarch of Antioch and All the East. and his co-consecrators were Roland Aboujaoudé, auxiliary bishop in Antioch, John George Chedid, retired bishop of Our Lady of Lebanon in Los Angeles, Stephen Hector Youssef Doueihi, Bishop of Saint Maron in Brooklyn, and Francis Mansour Zayek, Archbishop Emeritus ad personam of Saint Maron in Brooklyn. Shaheen was the first Lebanese Maronite priest or bishop from the United States. Pope Francis accepted his age-related resignation on July 10, 2013. Shaheen died on August 9, 2017 in St. Louis at the age of 80. He was buried in his birthplace of Danbury, Connecticut on August 21.
