Who's Who


To meet the researchers focusing on environment and energy areas, and to learn what they are doing, visit our Researchers directory.


Meet E²SHI's Leaders and Staff

Benjamin F. Hobbs is the Director of the Johns Hopkins Environment, Energy, Sustainability & Health Institute and the Theodore M. and Kay W. Schad Chair of Environmental Management at the JHU Department of Environmental Health and Engineering. His research applies systems analysis and economics to electricity policy, planning, and operations, as well as to ecological restoration and water resources management.

In addition to his posts at Johns Hopkins, Dr. Hobbs chairs the Market Surveillance Committee of the California Independent System Operator, and is a member of the Public Interest Advisory Committee of the Gas Technology Institute. He is also a Fellow of the Institute of Electrical and Electronics Engineers (IEEE) and the Institute for Operations Research and Management Sciences (INFORMS).  Dr. Hobbs serves on the editorial boards of the IEEE Transactions on Power Systems, Energy Economics, Energy, the Journal of Energy Engineering, the EURO Journal on Decision Processes, Economics of Energy & Environmental Policy, Journal of Energy Markets, and the Electricity Journal. He was previously Deputy Editor for Systems Analysis and Economics for Water Resources Research. 

Prior to joining Johns Hopkins in 1995, he was on the research staff at Brookhaven and Oak Ridge National Laboratories and was Professor of Systems and Civil Engineering at Case Western Reserve University. He has held visiting appointments at University of Cambridge, University of Washington, the Energy Research Centre of the Netherlands, and Helsinki University of Technology. In 2009-2010, he was an Overseas Fellow at Churchill College, Cambridge.

Dr. Hobbs earned a PhD in Environmental Systems Engineering from Cornell University, a MS from SUNY Syracuse and a BS from South Dakota State University.


Darryn Waugh is the Acting Director of the Johns Hopkins Environment, Energy, Sustainability & Health Institute and Professor in the Department of Earth & Planetary Sciences in the Krieger School of Arts & Sciences. His primary research interests are large-scale atmosphere and oceanic flow and transport, with a focus on understanding global environmental issues such as stratospheric ozone depletion and climate change. In recent years, his interests have expanded to include air quality/ urban heat and public health.

Dr. Waugh has participated in several international assessments, including a chapter author of several World Metrological Organization (WMO)/ United Nations Environment Program (UNEP) “Scientific Assessment of Ozone Depletion” publications, and is currently an editor for the Journal of Climate. He teaches courses in atmospheric and climate science, and was involved in establishing E²SHI as well as the Global Environmental Change and Sustainability (GECS) major at Johns Hopkins.

Dr. Waugh joined Johns Hopkins as an assistant professor in 1998 after working as a research scientist at the Cooperative Research Centre for Southern Hemisphere Meteorology at Monash University in Australia. He holds a PhD in applied mathematics from Cambridge University, and received both a masters and bachelor degree in mathematics from the University of Waikato in New Zealand.

Denise Nowlin is E²SHI’s administrator and oversees the administrative and financial activities of the institute. Denise is also the administrator for the Department of Environmental Health and Engineering in the Whiting School of Engineering, and brings extensive experience in administrative operations, finance and cost accounting.
Sean Carr is the Senior Research Service Analyst for E²SHI and the Department of Environmental Health and Engineering and has been with Johns Hopkins since 2008. His responsibilities include submitting proposals, managing awards, managing payroll for graduate student and hourly workers, interpreting compliance terms and conditions, and serving as liaison with the sponsored projects office.

Sean holds a Bachelor’s of Science in Business Administration from Towson University.​
Jessica is the Administrative Coordinator for E²SHI and the Department of Environmental Health and Engineering. Her administrative responsibilities for E²SHI include setting up and coordinating departmental meetings and events. Prior to joining JHU, Jessica worked in a receivables management company researching existing laws, interpreting evolving compliance regulations, answering complaints and disputes, and helping to develop company policies and procedures.

Jessica holds a Bachelor’s of Fine Arts from Maryland Institute College of Art.


When we heal the earth, we heal ourselves.
— David Orr