Warren Bittner is a genealogical researcher, educator, and author. He is a professional researcher accepting private clients; he specializes in German and German immigrant research. He is former owner of an independent research firm, and previously worked for the Family History Library as the German Collection Manager, Extraction Specialist, and Research Consultant.

Warren has coordinated German research courses for the Salt Lake Institute of Genealogy (SLIG), the Institute of Genealogy and Historical Research (IGHR), and the Genealogical Research Institute of Pittsburgh (GRIP).