Father Glenn was raised in Branchburg, graduated from Somerville High School and pursued a career as a Spanish and French teacher. His B.A. in Spanish and French was awarded Summa Cum Laude from Montclair State University in 1978. That same year, he was the recipient of a Fulbright-Hayes Teaching Assistantship to France where, for one year, Father Glenn was assigned a position teaching English grammar and American Civilization at the Lycee Joffre in Montpellier.

Upon his return to the USA, he entered graduate school at the University of New Mexico where he received an M.A. in French. It was during this time in the desert that Father Glenn discerned his vocation to the priesthood which, under the direction of his mentor in Albuquerque, resulted in his acceptance by then Bishop McCarrick as a candidate for the seminary in the newly formed Diocese of Metuchen. In 1986, after four years at Mount Saint Mary's Seminary in Emmitsburg, Maryland. Father Glenn was awarded the Masters of Divinity as well as an M.A. in Theology. On May 31, 1986 he was ordained a priest and assigned to advanced studies in Systematic Theology at the Pontifical Gregorian University in Rome. With his background in French, it was no surprise that he perused the writings of Jean Mouroux, a little-known theologian from Dijon who wrote just five books and 60 articles in the 1940's and 50's. Father Glenn was intent on on discovering how Saint Thomas Aquinas' supernatural existential, the writings of philosophers Maurice Blondel and Jacques Maritain, as well as the early 20th century thought of both Rousselot and Marechal influenced this French priest-professor. Father Glenn decided to write his dissertation on Mouroux's theology of the body, which he successfully defended on May 26, 1990.

Upon his return to New Jersey, then Bishop Hughes assigned Father Glenn as Parochial Vicar of Our Lady of Perpetual Help in Bernardsville. At this time he also began teaching part-time at Seton Hall University, a post he held on and off for six years. In 1992, Bishop Hughes asked Father Glenn to study Portuguese, which required weekly visits to a Portuguese parish in Elizabeth as well as a summer in a parish in Portugal. In September, he became Pastor of Saint Stephen Protomartyr Church in South River. During his pastorate, Father Glenn offered the Portuguese Mass monthly at Corpus Christi Church in the same town. He also became Chaplain of the fire department and continued teaching part-time at both Seton Hall and the College of Saint Elizabeth. For several years, Father Glenn taught the Spanish tract of the theology courses required by the Diaconate Formation of the Diocese of Metuchen.

In 1998, then Bishop Breen asked Father Glenn to take on a three-year position as Episcopal Vicar for the City of Perth Amboy and, concomitantly, a six-year term as Pastor of Our Lady of the Most Holy Rosary parish in Hopelawn. There he also volunteered his services as Chaplain to the Perth Amboy Police Department. He also initiated a Spanish/French program into the curriculum of the Perth Amboy Catholic School where he taught both languages for three years. In 2001, Father Glenn also began teaching religious studies part-time at Saint John's University in New York.

In the Diocese of Metuchen, Father Glenn has held numerous positions including Chairman of the Commission for Ecumenism, Director of the Office for Multicultural Ministries, Bishop's Delegate on the Ethics Committee of Saint Peter's University Hospital, Censor Librorum Chair of the Hispanic Commission and Chair of the Theological Commission.