Donn Gulek was the Chief Historian at the Kellmer Institute of Galactic History as late as 17 ABY. He specialized in the history, development, and structure of the New Republic. A version of his article "Ten Years After: Notes on the Mature Organizational and Administrative Structure of the New Republic" was edited and annotated by Voren Na'al in cooperation with New Republic Intelligence, and was included in their dossier on the Black Fleet Crisis.