· Chief Scientist, Julia Computing, Inc.2015–
· Founder and Chief Scientific Officer (CSO), Interactive Supercomputing2004–2009
· Professor of Applied Mathematics, MIT2002–
· Associate Professor of Mathematics, UC Berkeley1999–1999
· Associate Professor of Applied Mathematics, MIT1998–2002
· Assistant Professor of Applied Mathematics, MIT1993–1998
· NSF-NATO Postdoctoral Fellow, CERFACS1990–
· Morrey Assistant Professor, UC Berkeley1990–1993
· Computing Scientist, Thinking Machines Corporation1989–1990
· PhD in Applied Mathematics, Massachusetts Institute of Technology1985–1989
· Predoctoral Research Assistant, IBM T.J. Watson Research Center1984–1985
· MS in Mathematics, Yale University1980–1984