Douglas Arent (Ph.D., 1987) joined the Andlinger Center in May 2022 as a non-resident fellow. Arent is an Executive Leadership Team Member and Executive Director of Strategic Public Private Partnerships at the Department of Energy’s National Renewable Energy Laboratory (NREL), where he focuses on strategic public and private partnerships to transform global energy economies at speed and scale. DDuring his fellowship, Arent collaborated with researchers, including Jesse Jenkins, Eric Larson, Chris Greig, and Elke Weber, on developing a strategic roadmap for future growth of energy systems and energy transitions research at Princeton. He also participated in research on international Net Zero efforts, with attention to fostering connections between NREL and Princeton to leverage their unique institutional strengths and build long-term working relationships.

Jeff Bielicki is an associate professor at The Ohio State University where he holds a joint appointment in the Department of Civil, Environmental, and Geodetic Engineering and in the John Glenn College of Public Affairs. He is also on the faculty of the Environmental Science Graduate Program. Bielicki serves as a research program lead for sustainable energy at Ohio State’s Sustainability Institute, where he sets strategic priorities for research and cultivates the university energy research community. His scholarship focuses on issues where energy and environmental systems and policy interact – primarily on topics related to carbon management, renewable energy, and the energy-water nexus. Bielicki has also held appointments as a visiting professor at ETH-Zurich, a research associate at the University of Minnesota, a Weinberg Fellow at Oak Ridge National Laboratory, a fellow at the Baker Center for Public Policy at the University of Tennessee, and a research fellow with the Energy Technology Innovation Policy group at Harvard University. Prior to earning his Ph.D., he was a mechanical engineer at Fermi National Accelerator Laboratory, developing devices and infrastructure for producing antiprotons. Bielicki holds a Ph.D. (2009) and an M.P.A. (2003) from Harvard University, an M.B.A. from the University of Chicago (2000), and a B.S. from Valparaiso University (1996).

Rui Bo is an associate professor in electrical and computer engineering and affiliated faculty in economics at Missouri University of Science and Technology. He earned his BSEE and MSEE from Southeast University, China, and a Ph.D. from the University of Tennessee, Knoxville. His industry experience includes roles at ZTE, Shenzhen Cermate Technologies, and MISO, where he advanced from engineer to project manager before joining Missouri S&T in 2017. A Fellow of IET and Senior Member of IEEE, his research focuses on computation, optimization, and economics in power systems, high-performance computing, and electricity markets. He has published over 100 papers, serves as Associate Editor for multiple IEEE journals, and holds leadership roles in IEEE committees. Bo contributed to MATPOWER and the IEEE Power and Energy Technology Roadmap, and his honors include the NSF CAREER Award (2024), DARPA Young Faculty Award (2018), and numerous IEEE and institutional awards.

Tor Brostrom is a Swedish professor specializing in building conservation, currently at Uppsala University’s Department of Archaeology, Ancient History and Conservation on Campus Gotland. He earned his Bachelor of Science degree in engineering from Princeton (1980), a Teknologie Licentiat from Chalmers (1984), and a Ph.D. in energy engineering from KTH (1996), with his dissertation focused on moisture and heat modelling in church heating systems. His research centers on energy efficiency, indoor climate control, and climate adaptation in historic buildings, employing interdisciplinary and applied approaches to balance energy conservation with heritage preservation. Broström served as the scientific coordinator of Sweden’s national R&D program on energy efficiency in heritage buildings (2007–2024), co-led European standardization efforts (CEN EN16883), and held key roles in major international projects, including as scientific coordinator for the EU’s Climate for Culture and EFFESUS initiatives. Brostrom joins the Andlinger Center for Energy and the Environment as a Gerhard R. Andlinger Visiting Fellow in January 2026.

Harold May joined the Andlinger Center in September 2022 as a Gerhard R. Andlinger Visiting Fellow with a one-year appointment. May is Professor emeritus of Microbiology and Immunology at the Medical College of South Carolina, where he directed wide-ranging research related to microbial applications for organic pollutant remediation, biofuels, and synthesis of fuels and chemicals from CO₂. A fellow of the National Academy of Inventors, May is the founder of two companies focused on microbial production of fuels and chemicals. At Princeton, he will collaborate with Z Jason Ren on research to improve the efficiency and throughput of combined microbial-electrochemical methods for converting CO₂ into fuels and chemicals, with the aim of developing scalable systems that can be used to capture CO₂. To complement these efforts, May plans to organize a workshop at Princeton for the broader research community to identify key research challenges in microbial CO₂ capture and foster new collaborations.

Steven C. Freilich is currently executive-in-residence in the Joint Institute for Strategic Energy Analysis at National Renewable Energy Laboratory, having recently retired from DuPont after a 33 year career. For the last 12 years of his DuPont career, he served as the director of materials science in DuPont Central Research and Development. In that role, Freilich was responsible for developing and implementing the technology growth strategies in rapidly moving areas such as materials for energy, displays, and biomedical applications. He used his experience to impact corporate innovation through leadership at the interface of technology and markets.

During his tenure as director of materials science, Dr. Freilich held the additional position of CTO of the DuPont Electronics and Communication Platform, and was appointed as the chief technology advocate for North Asia. He has served on the boards of the United States Display Consortium, DuPont Photonics Technologies, the DuPont-MIT Alliance, and was the vice chair of both the advisory panel for the Center for Revolutionary Solar Photoconversion and the advisory committee for the Clean Energy Manufacturing Analysis Center in the Department of Energy. He has also served on the advisory boards for Sandia National Laboratory, the National Renewable Energy Laboratory, and the National Research Council of Canada.

Sarah Glaven is a distinguished authority in biotechnology and biomanufacturing. She is a senior biologist at the United States Naval Research Laboratory where she has pioneered the field of electromicrobiology, the study of the interaction between microbes and electronic devices. She has published dozens of research articles cited thousands of times (>3700) and holds multiple patents. She has collaborated extensively with the private sector through cooperative research and development agreements and patent licensing.

Glaven has played a pivotal role in modernizing biotechnology in the Department of Defense, receiving the first research award to collaborate with MIT to advance synthetic biology for ocean sensing, and later leading a team of researchers from the Navy, Army, and Air Force to further expand biotechnology for defense applications more broadly. Glaven then brought her expertise to the Pentagon to establish and lead the Tri-Service Biotechnology for a Resilient Supply Chain program, overseeing deployment of >$300 million to update laboratory infrastructure and create public-private partnerships to prototype and demonstrate biotechnology for defense. She has trained countless postdoctoral researchers and students, including the first iGEM team from the United States Naval Academy. In 2022, she served as Branch Chief of the Laboratory for Biosensors and Biomaterials where she supervised a staff of over 20 scientists and engineers. She is a fellow of the International Society for Microbial Electrochemistry and Technology and served as its President from 2018-2019.

Glaven recently served as Principal Assistant Director for Biotechnology and Biomanufacturing in the Office of Science and Technology Policy. She led the National Biotechnology and Biomanufacturing Initiative by establishing and chairing the National Bioeconomy Board. She oversaw coordination and implementation of over $15 billion in federal funding across the executive branch, including the Department of Defense, Department of Energy, Department of Health and Human Service, United State Department of Agriculture, and the National Science Foundation. She worked with the Science Advisor to the President and the National Security Council to advise the President on all areas of the bioeconomy, including research and development, data, infrastructure, procurement, workforce, regulation, biosafety and biosecurity, international engagement, and national security.

Judith Greenwald, Class of 1982, is a former U.S. Department of Energy (DOE) executive with more than 30 years of policy experience working in government and the nonprofit sector. She is a graduate of the School of Engineering and Applied Science and returned as a fellow in spring 2018. During her time at the center, she collaborated on research, lectured, advised students, brought in speakers, and convened industry, government, and NGO leaders. She liaised with the undergraduate student group, Princeton University Energy Association, to facilitate the group’s inaugural conference to examine New Jersey’s power markets and policy reforms in April 2018. Greenwald guest lectured at the Keller Center for Innovation in Engineering Education and at Conversations on the Environment and Responsible Energy and Life. She organized “Accelerating Climate Action in the United States: What Are We Doing and What More Can be Done,” a September 2018 public conference, featuring keynote speaker Tammy Snyder Murphy, First Lady of New Jersey. In her lectures, Greenwald emphasized that the causes of and solutions to climate change rest at the intersection of public policy, technology, market forces, and human behavior. Greenwald is now Executive Director of the Nuclear Innovation Alliance.

Darren Hammell, Class of 2001, is co-founder and president of Princeton Power Systems, a designer and manufacturer of microgrid and battery solutions. He founded the company as an undergraduate at Princeton’s School of Engineering and Applied Science and the company is now a global leader with thousands of deployments across North America, Europe, Africa, and the Caribbean. Hammell returned for a fellowship during which he provided support to start-up companies that have been founded at the Andlinger Center. He led discussions and served as a panelist at the 2018 Annual E-ffiliates Retreat and lectured on his experience commercializing energy technology during the Andlinger Center’s executive education module for Young Global Leaders in July 2018. He also led the development of a course on commercializing energy technologies at the Andlinger Center.

Philippe Jacquod holds a Diplom degree in theoretical physics from the ETH Zurich, Switzerland, and a Ph.D. in natural sciences from the University of Neuchâtel, Switzerland. He is currently a professor in the Department of Quantum Matter Physics at the University of Geneva and the engineering department at the University of Applied Sciences of Western Switzerland. Previously, he served as an assistant professor in the theoretical physics department at the University of Geneva from 2003 to 2005 and as a professor in the physics department at the University of Arizona from 2005 to 2013. His current research interests encompass electric power systems and their evolution during the ongoing energy transition.

Klaus Jäger joins the Andlinger Center in August 2024 as Gerhard R. Andlinger Visiting Fellow. Jäger will work with Jyotirmoy Mandal, Forrest Meggers, and Barry Rand on radiative cooling concepts for solar modules. Jäger has been working at the Helmholtz-Zentrum Berlin, Germany, since 2015, where he currently serves as the deputy head of the Department Optics for Solar Energy and the vice director of the Joint Lab “BerOSE” between Helmholtz-Zentrum Berlin, Zuse Institute Berlin, and Freie Universität Berlin.

Jean-Marcel Rax joined the Andlinger Center in September 2022 as a Gerhard R. Andlinger Visiting Fellow with a six-month appointment. Rax is a University Professor at Université de Paris-Saclay and École Polytechnique. Among his many accomplishments, Rax has served as Technical Adviser and Scientific Advisor to the French Atomic Energy Commission and as Director of the Laboratory for Plasma Physics and Technology at École Polytechnique. At Princeton, Rax is collaborating with Nathaniel Fisch on two projects related to plasma applications in fission and fusion energy. One project will examine reactors for rotating magnetized plasmas to enable efficient reprocessing of spent fuel from nuclear fission. The other project focuses on how injecting pulses of electrons into Tokamak fusion reactors can be used to control the plasma motion and improve reactor performance.

Michael Saliba joined the Andlinger Center as a Gerhard R. Andlinger Visiting Fellow from Stuttgart University, where he is a full professor and the Director of the Institute for Photovoltaics. Hosted by Barry Rand, Saliba collaborated with a number of Princeton researchers to develop high- performing perovskite solar cells with long-term stability. Perovskite solar cells are highly tunable alternatives to silicon solar cells, which dominate today’s commercial solar market.

During his visiting fellowship, Saliba explored the interplay of chemistry, physics, and materials science to advance the development of high-performance tandem solar cells, in which different types of solar cells are stacked on top of each other to increase their efficiency at converting solar energy into electricity.

Sharon L. Walker, Ph.D., is Dean of Drexel Engineering and Distinguished Professor of Civil, Architectural and Environmental Engineering, as well as Executive Director of ELATES at Drexel, a national leadership development program committed to increasing the representation of women in STEM. She is also chair of the Engineering Deans Council of the American Society for Engineering Education (ASEE). Walker is principal investigator on the NSF Advance Grant, “Catalyzing STEM Gender Equity at Drexel: Building a Foundation for Systemic Transformation,” and in 2021 received the Winifred Burks-Houck Professional Leadership Award from the National Organization for the Professional Advancement of Black Chemists and Chemical Engineers. A Yale University-trained water quality systems expert focusing on the fate and transport of bacteria and nanoparticles in water, Walker is a fellow of AEESP, AAAS, and AIMBE. Walker has produced more than 250 conference papers and publications, and in 2018 won the AEESP inaugural Mary Ann Liebert Award for Publication Excellence in Environmental Engineering Science. She holds a Ph.D. in Environmental Engineering and an MS in Chemical Engineering, both from Yale, and earned two undergraduate engineering degrees in environmental engineering and environmental studies from the University of Southern California.

Harry A. Warren, Jr. is president of CleanGrid Advisors LLC, a renewable energy consulting firm focused on Mid-Atlantic markets. Warren is also a co-founder of the Center for Renewables Integration, a non-profit working to advance the deep penetration of renewable energy on the grid.

Warren was formerly executive vice president of Community Energy, Inc. where he was responsible for business planning on community solar, virtual net metering, and other retail customer access programs. Prior to joining Community Energy, Warren spent 17 years as president of Washington Gas Energy Services, Inc., a leading retail electricity and natural gas marketer in the mid-Atlantic region, and served in several positions at WGES’ utility affiliate, Washington Gas prior. Warren negotiated the corporation’s first solar PPAs in 2008 and 2009. Prior to joining Washington Gas, he worked in research, development and design of renewable energy systems.  At the Andlinger Center, Warren studied how energy resources and building energy systems can be designed and operated to help meet the challenges power grids face from increasing percentages of variable, renewable energy supplies.

He holds a bachelor’s degree in mechanical engineering from Princeton University and a master’s degree in mechanical engineering from Stanford University.

During his time as a visiting fellow, Warren, a 1979 alumnus, curated a full-day conference aimed at facilitating conversation between diverse players within the energy industry, from renewable energy developers to utility regulators, in collaboration with Energy Dialogues LLC.