Klabjan is an associate professor at the Northwestern University, Evanston, Illinois, Department of Industrial Engineering and Management Sciences. After obtaining his doctorate from the School of Industrial and Systems Engineering of the Georgia Institute of Technology in 1999, in the same year he joined the University of Illinois as an assistant professor in the former department of Mechanical and Industrial Engineering. After returning from his sabbatical leave of absence at the Massachusetts Institute of Technology, in 2006 he joined the Department of Civil and Environmental Engineering at the University of Illinois at Urbana-Champaign. In summer 2007 he accepted an associate professor position at Northwestern University. He is the recipient of the first prize of the 2000 Transportation Science Dissertation Award and the Preseren's award for the outstanding undergraduate thesis. He is a former president of the INFORMS Aviation Applications Section and he is actively involved in AGIFORS.