The Princeton University Board of Trustees has approved the appointments of four assistant professors, including two in the Andlinger Center for Energy and the Environment.

Barry Rand, in electrical engineering and the Andlinger Center for Energy and the Environment, will join the faculty on July 1, 2013, for a three-year term. He is currently a senior research at IMEC vzw in Leuven, Belgium, and his research interests are photovoltaics and organic electronics. He received his bachelor’s degree from the Cooper Union for the Advancement of Science and Art and his Ph.D. at Princeton in 2006.

Daniel Steingart, in mechanical and aerospace engineering and the Andlinger Center for Energy and the Environment, will join the faculty on Feb. 1, 2013, for a term of three and a half years. He is currently an assistant professor at the City University of New York, with a specialization in energy systems. He received his bachelor’s degree at Brown University and his Ph.D. at the University of California-Berkeley, where he also spent a year as a postdoctoral researcher. He also served as chief technology officer of Wireless Industrial Technologies and senior applications engineer at Sentilla Corporation.