Krejci holds a Ph.D. in Interdisciplinary Studies from the University of Alaska Fairbanks, where he teaches courses in music history and Alaska Native music. His research combines the disciplines of music and anthropology and examines musicultural change and early musical processes of globalization among indigenous cultures of northern Alaska and northwestern Canada during the 18th, 19th and 20th centuries. He has also done fieldwork focusing on the state of present-day indigenous musical forms and the musical impact of early commercial whaling along the Arctic coast.