The instrument fabrication was managed by the Lawrence Berkeley National Laboratory and oversees operation of the experiment including a 600-person international scientific collaboration. Cost of construction was $56M from the US Department of Energy 's Office of Science plus an additional $19M from other non-federal sources including contributions in-kind. The leadership of DESI currently consists of the director, Dr. Michael E. Levi, collaboration co-spokespersons Prof. Kyle Dawson and Dr. Nathalie Palanque-Delabrouille, project scientists Dr. David J. Schlegel and Dr. Julien Guy, project manager Dr. Patrick Jelinsky, instrument scientists Prof. Klaus Honscheid and Prof. Constance Rockosi. Past collaboration spokespersons have been Prof. Daniel Eisenstein and Prof. Risa Wechsler.