After obtaining a B.Sc. degree in physics in 1986 from Imperial College,
earned a Ph.D. in physics from the Massachusetts Institute of Technology in
1992. From there, he joined the Department of Physics, Brookhaven National
Laboratory, as a post-doc. He was promoted through the ranks and received
tenure in 1999. He was appointed Group Leader of the X-ray Scattering Group
in 2001. John was awarded the Presidential Early Career Award and the
DOE Young Independent Scientist Award in 1996 and was elected a fellow of
the APS in 2002
He served on the NSLS Users Executive Committee from 1999 to 2001, and from 2001 to 2007, he
was the Executive Director of IXS-CDT, a consortium that led the design,
construction and commissioning of an inelastic x-ray scattering beamline at
the Advanced Photon Source.
From February 2006 to August 2008, he served
as Experimental Facilities Division Director for the NSLS-II project, with
responsibility for overseeing all aspects of the design, construction and
commissioning of the Experimental Facilities, a scope of work that includes
beamlines, the associated R+D programs and the interaction with users.
He now serves as Special Assistant for Photon Sciences within the Basic
Energy Sciences Directorate, with responsibility for coordinating the
Directorate's planning and use of current and future photon sources.
His research is presently focused on understanding the novel electronic
ground states and excitations in strongly correlated electron systems with
particular focus on the electron dynamics as probed in the energy domain
(inelastic scattering) and in the time domain (time resolved measurements
from femto seconds to minutes).