Chair, Computer Science & Mathematics, Computational Science Initiative, Computational Science Initiative
- Ph.D. in Computer Science ,Queen's University of Belfast, Northern Ireland, U.K
- B. Sc. Hons (1st Class), Mathematics, University of Canterbury, Christchurch, New Zealand
- 09/15: —; Scientist, Brookhaven National Laboratory
- 09/15 — ; Professor, Stony Brook University
- 04/13 — ; Member, Scientific Advisory Council, Juelich Research Center
- 09/12 — ;08/15 Interim Director, Center for Advanced Computing and Data Systems , University of Houston
- 08/11 — : Member, Advanced Scientific Advisory Committee, Dept of Energy
- 09/07 — : Professor, Computer Science, University of Houston, TX
- 02/99 – 08/07: Associate Professor, Computer Science, University of Houston, TX
- 07/00 – 06/03: Visiting Reader, Electronics and Computer Science, University of Southampton, U.K.
- 07/98 – 01/00: Reader, Electronics and Computer Science, Uni. Southampton, U.K.
- 1995 – 2000: Consultant, ICASE, NASA Langley Research Center, Hampton, VA
- 01/95 – 08/98: Director, VCPC, European Cntr Parallel Computing, Vienna, Austria
- 01/91 – 08/98: Research Associate, Dept. Software Technology and Parallel Systems, University of Vienna, Vienna, Austria
- 10/85 – 12/90: Lecturer, Dept. Computer Science, University of Bonn, Bonn, Germany