Biles has served in several administrative posts, including Department Head at Oklahoma State University from 1987-1989 and 1991-1993; Interim Associate Dean for Academic Affairs at Oklahoma State University from 1993-1994; and Department Chair at East Carolina University from 1994-1998.
Biles teaches courses in twentieth century U.S. history and urban history. He has written or edited nine books, including Richard J. Daley: Politics, Race, and the Governing of Chicago (1995), From Tenements to the Taylor Homes: In Search of an Urban Housing Policy in Twentieth-Century America (2000), and Encyclopedia of the Great Depression (2004). He has published articles in such journals as the Journal of Urban History, The Journal of Southern History, Labor History, Presidential Studies Quarterly, Planning Perspectives, the American Indian Culture and Research Journal, and the Journal of Negro History. He has served as a member of the Board of Directors of the Urban History Association and as a consultant for the U.S. Department of Education.
Biles earned his Ph.D. in 1981 from the University of Illinois at Chicago. He also holds a M.A. (1974) and a B.A. (1972) from the University of Illinois at Urbana.