Dr. Paul Messina is an Argonne Associate in the Computing, Environment, and Life Sciences Directorate and Argonne Distinguished Fellow.  During 2015-2017, he served as Project Director for the U.S. Department of Energy Exascale Computing Project.  From 2008-2015, he served as Director of Science for the Argonne Leadership Computing Facility.  In 2002-2004, he held the position of Senior Computer Scientist at Argonne and served as Adviser to the Director General at CERN (European Organization for Nuclear Research).

From 1987-2002, he was founding Director of the Center for Advanced Computing Research, Assistant Vice President for Scientific Computing, and Faculty Associate for Scientific Computing at the California Institute of Technology (Caltech).  While at Caltech, he held a joint appointment at the Jet Propulsion Laboratory as manager of High-Performance Computing and Communications.  Dr. Messina led the DOE-NNSA Accelerated Strategic Computing Initiative while on leave from Caltech from October 1998 through 2000.

At Argonne, he held a number of positions from 1973-1987 and was the founding Director of the Mathematics and Computer Science Division.