· Interim Director, Data Science Institute, Columbia University2021–2024
· Chair of Industrial Engineering and Operations Research Department, Columbia University2008–2013
· Wai T. Chang Professor of Industrial Engineering and Operations Research and Professor of Computer Science, Columbia University2001–
· Professor, Dartmouth College1992–2001
· PhD in Computer Science, Massachusetts Institute of Technology1992–
· Master of Science, Massachusetts Institute of Technology1989–
· B.S.E. in Computer Science, Princeton University1987–