Sanger was a Human male in Starfleet in the 24th century.

In 2370, an ensign fresh out of Starfleet Academy, Sanger was assigned to Deep Space 9. He was usually assigned to Jadzia Dax to assist in her research. In that year he was on duty in ops when the station found itself being eaten by a group of juvenile Horta. (DS9 novel: Devil in the Sky)