A full bio is not yet available, but I have put together the following from some pages of the publishers he worked with. I will update the post as more information becomes available.
Ralph P. Martin retired from his position as distinguished scholar in residence at Fuller Theological Seminary and previously at the Graduate School of Theology of Azusa Pacific University. He was formerly professor of New Testament at Fuller Theological Seminary and associate professor in biblical studies at the University of Sheffield. He is the author of numerous studies and commentaries on the New Testament, including Worship in the Early Church, the volume on Philippians in The Tyndale New Testament Commentary series, and James in the Word Biblical Commentary, for which he also served as New Testament editor.