2008 ACM Fellow
2008 IBM Research Division Award, PERCS project (Phase 3)
2006 ACM Distinguished Scientist
2006 IBM Research Division Award, PERCS project (Phase 2)
2006 Honorable Mention, HPC Challenge Class 2 Award, Supercomputing 2006
2005 IBM Outstanding Technical Achievement Award, Jikes Research Virtual Machine
2003 IBM Research Division Award, PERCS project (Phase 1)
2001 IBM Research Division Award, Jikes Research Virtual Machine
1998 Third Invention Achievement Award, IBM
1998 Best paper, LCPC workshop (one of three best papers)
1998 Second Invention Achievement Award, IBM
1997 IBM Outstanding Innovation Award, ASTI optimizer
1997 Best paper, International Conference on Parallel Processing
1996 First Invention Achievement Award, IBM
1994 Best IBM paper, CASCON ’94
1985 First place, ACM International Collegiate Programming Contest
1981 Best B.Tech. project, IIT Kanpur - Jointly with Ratna Gupta (later Sarkar)

(Excludes Awards during School days)