Michael Joncas is a prominent American composer, liturgist, and theologian known for his contributions to contemporary Catholic music. He is particularly recognized for his hymn "On Eagle's Wings," which has become a staple in many religious services. Joncas has also served as a professor and has been involved in various church music organizations. In addition to his musical work, Joncas has written extensively on the relationship between music and worship. He holds degrees in theology and music, which have informed his approach to liturgical composition. His efforts have significantly influenced the landscape of modern Catholic liturgy.