I'm a Principal Research Staff Member at IBM's T. J. Watson Research Center in Yorktown Heights, NY, and am currently serving as Network Lead in the Data Centric Systems department, and for the upcoming CORAL systems to be delivered to both Oak Ridge National Lab and Lawrence Livermore National Lab.
After joining IBM Research in 1990, I became one of the co-designers of the Vulcan parallel computer prototype, and was extensively involved in incorporating the Vulcan switching network and control software into IBM's first parallel supercomputer offerings: the SP1 and SP2, which debuted in 1994. I made many contributions to the SP Switch2 network (also known as Colony, appearing in the ASCI White system in 2000) and to the SP High-Performance Switch (also known as Federation, used in the 100 Tflops ASC Purple machine). I served as Senior Manager of Deep Computing Software during the development of the IBM Blue Gene/P and Blue Gene/Q supercomputers. I received four IBM Outstanding Technical Achievement Awards for contributions to IBM supercomputers, and hold 16 U.S. patents related to switching networks.
I served as an associate editor of the IEEE Transactions on Parallel and Distributed Systems from 1997 to 2000, co-chaired the 1997 & 1998 Workshops on Communication and Architectural Support for Network-based Parallel Computing, the 2001–2010 Workshops on Communication Architecture for Clusters (CAC), and the 2011–2013 Workshops on Communication Architecture for Scalable Systems (CASS).
I'm a Fellow of the IEEE and a member of ACM. Current research interests include parallel architectures, applications, algorithms, and performance analysis.