Dr. McGrew is an Old Testament scholar and specializes in the Book of Job. He is also especially interested in bringing Biblical Studies into a deeper dialogue with the Church's traditional, Christological readings of the Old Testament. He began studying theology and the Bible in its original languages to prepare for the ministry, and he remains focused on fostering prayer through biblical piety.

In July 2022, Dr. McGrew authored an article with Catholic Biblical Quarterly titled, "'What Is Enosh?' The Anthropological Contributions of Job 7:17–18 through Allusion and Intertextuality." He is currently writing a book on Job's parabolic dramatization of Israel's scriptural and mythological traditions titled, The Riddle of Job: Parabolic Argumentation in the Book of Job. And lastly, he has a forthcoming article with Nova et Vetera, with the title, "Divine Repentance or Pedagogy? On the Rhetoric of Divine Repentance in 1 Samuel, Exodus, and Genesis."