Christopher Zeichmann's specialization is in the New Testament, where he has two primary areas of research:
The first is in the Graeco-Roman context of early Christianity, especially in the depiction of the military in early Christian writings. Zeichmann's book, The Roman Army and the New Testament can be found at the Ryerson University Library & Archives.
Zeichmann's second area of research is in the politics of biblical interpretation; this concerns the role of our social contexts play in the interpretation of the Bible and related texts. For instance, why is there a widespread tendency to "spiritualize" various sayings attributed to Jesus, since we assume they cannot mean what they literally say (e.g., Mark 10:24-27)?
He also teaches Ancient Greece and Rome in Ryerson's Department of History.