1996 - ENTREPRENEUR
2016 - 2017 Co-Founder, CEO. Campaign Storage, LLC.
2011 - 2015 Founder, CEO, Parallel Scientific LLC & DocsForce
2010 - 2013 Senior Vice President, Chief Software Architect, Fellow Xyratex Inc.
2009 - 2010 Founder, CEO, Chairman ClusterStor LLC (acquired by Xyratex)
2007 - 2008 Vice President of Lustre, SUN Microsystems
2001 - 2007 Founder, CEO, Chairman, Cluster File Systems (acquired by SUN Microsystems)
2000 - 2001 Co-Founder, VP Engineering, Mountain View Data, Inc. (assets acquired by NEC and others).
2000 - 2001 Storage Architect, Red Hat Inc.
2000 - 2000 Chief Architect, TurboLinux
1995 - 2000 Co-Founder, CEO. Stelias Computing, Inc. (acquired by TurboLinux).
1996 - SCIENTIST
2019 - Visiting Professor of Physics, Oxford University
2018 - Visiting Scholar, Center for Computational Astrophysics, Flatiron Institute, NYC
2015 - 2017 Visiting Scholar, Pembroke College, Cambridge University
2013 - Principal, Braam Research, LLC
2007 - 2010 Adjunct Professor Chinese Academy of Sciences
1996 - 2005 Senior Systems Scientist (faculty position) School of Computer Science, Carnegie Mellon University
1980 - 1997 MATHEMATICIAN
1992 - 1993 Special Fellowship, Oxford University
1992 Visiting Professor, University of British Columbia
1991-1997 University Lecturer and Tutorial Fellow (tenured), St. Catherine’s College, Oxford
1988-1991 Assistant and (tenured) Associate Professor of Mathematics, University of Utah
1987-1990 Junior Research Fellow, Merton College Oxford
1987-1990 Christian and Constantijn Huygens Fellow, National Dutch Science Foundation
1985 University of Utrecht, Research Assistant
1981-1984 University of Utrecht, Teaching Assistant
1987 Oxford University DPhil in Mathematics, supervisor Sir Michael Atiyah
1984 University of Utrecht MSc in Mathematics, supervisor Prof. J.J. Duistermaat
2007 Software Engineering Institute, Carnegie Mellon University - Certified Software Architecture Professional
2004 Software Engineering Institute, Carnegie Mellon University - Certified Team Software Process instructor and coach