After his Ph.D. Dr. Harris went to Lawrence Berkeley National Laboratory in Berkeley, California, to conduct his post-doctoral work in high-energy nuclear physics from 1978 to 1979. After working as a senior guest scientist at the Gesellschaft für Schwerionenforschung in Darmstadt, Germany, from 1980 to 1984, he returned to LBNL in 1984 and was appointed divisional fellow in the Nuclear Science Division. He became staff senior scientist in 1989 and served in this role until 1995. During his time at LBNL he was a collaborator in the NA35 experiment at CERN, spokesperson of the Bevalac CCD-Streamer Chamber Experiments at LBL, CERN NA35 Project Leader in Nuclear Science Division at LBL, RHIC project leader in Nuclear Science Division at LBL and deputy program head of the Relativistic Nuclear Collisions Program. His most significant work from this period focused on compression effects in nucleus-nucleus collisions, pion production in high energy nucleus-nucleus Collisions, and on directed and elliptic flow in Pb+Pb collisions at the CERN SPS.
Yale University
In 1996, Dr. Harris joined the faculty of Yale University in New Haven, Connecticut, as a tenured professor of physics. At Yale he served as Director of the Wright Nuclear Structure Laboratory, in the Yale Science Council, and in the inaugural Yale Faculty Senate. Dr. Harris has served in the Physics Department as Director of Graduate Studies, Director of Undergraduate Studies, Associate Physics Department Chair and Director of Postdoctoral Affairs in Physics.
STAR Collaboration
The STAR collaboration, which is carrying out experiments at the Relativistic Heavy Ion Collider at Brookhaven National Laboratory on Long Island, New York, was founded in 1991, and John Harris served as its founding spokesperson from 1991 to 2002. He also served as the acting project manager from 1991 to 1992. At present, he is still a member of this collaboration. Among the most important discoveries by the STAR collaboration is the "perfect liquid".
ALICE Collaboration
Dr. Harris joined the ALICE collaboration at the CERN Large Hadron Collider in 2006 and became the national coordinator for the ALICE-USA Collaboration. In ALICE he served on the Physics Board, Management Board and Collaboration Board.
Chair of New RHIC Detector Inaugural Institutional Board, 2015
Nuclear and Particle Physics Program Advisory Committee, Brookhaven National Laboratory, member 2014-2020, Chair 2016-2020
Member of the organizing committees of the annual Winter Workshop on Nuclear Dynamics, since 1992.
Honors
Dr. Harris received the Nuclear Science Divisional Fellowship, Lawrence Berkeley Laboratory, U.C. Berkeley, in 1984, the Alexander von Humboldt Fellowship of the Federal Republic of Germany in 1986, and the Lawrence Berkeley Laboratory Performance Achievement Award in 1993. Harris was awarded the Alexander-von-Humboldt Foundation Distinguished Senior U.S. Scientist Award in 1994. He was elected Fellow of the American Physical Society in 1996. In 2002, on the occasion of the 40th Anniversary of Stony Brook University, he was designated a Top 40 Distinguished Alumni. In 2007 Dr. Harris presented the Robert Hofstadter Endowed Lectures at Stanford University.