Cecilia Sorensen M.D.


Dr. Sorensen is an Associate Professor of Environmental Health Sciences at Mailman School of Public Health and Associate Professor of Emergency Medicine at Medicine at Columbia Irving Medical Center. Translating research into policy, clinical action, and education in order to build resilience in vulnerable communities is the focus of her endeavors. Her recent work has spanned domestic as well as international emergent health issues related to climate change, including, heat stress and worker health in Guatemala, wildfires and health care utilization in the United States, the emergence of Zika virus in Ecuador following the Earthquake of 2016, climate change and women’s health in India and mortality following hurricane Maria in Puerto Rico. She has served as an author for the U.S. Fourth National Climate Assessment and serves as a technical advisor for the Lancet Climate and Health U.S. Policy Brief.  She is a member of the Colorado Consortium for Climate Change, a scientific advisor for the Citizens Climate Lobby and the course director for the nations’ first medical school course on climate change and human health.  She also co-directs the National Climate-Health Fellowship program, a post-residency training program for physicians.


Danielly Magalhães, MPH, PhD 

Senior Project Director 

Dr. Magalhães is an Environmental Health Scientist from Brazil, with expertise in Global Health, Sustainable Development, Climate Change, Biodiversity, and Toxicology. She is passionate about understanding the impact of environmental factors on biological systems. Dr. Magalhães earned her undergraduate degree in Biology in Brazil, followed by an MPH focusing on Environmental Toxicology and Occupational Health, a Doctoral degree in Environmental Chemistry, and a specialization in Global Health and Health Diplomacy.

Afterward, she relocated to Washington, DC, conducting postdoctoral research on environmental epidemiology, specifically examining the effects of chemicals on human reproduction at the Milken Institute of Public Health at George Washington University. For many years, she served as a researcher at Fiocruz, the renowned Brazilian research institute under the Ministry of Health. Initially, her work centered on Ecotoxicology to inform stakeholder decisions. Later, she transitioned to Global Health, actively participating in initiatives like Rio+20 and supporting Fiocruz's Strategy for the 2030 Agenda. Her focus shifted toward the role of Science, Technology, and Innovation in achieving the Sustainable Development Goals, with involvement in UN Forums.

Currently, she is part of an Observatory at Fiocruz, where she engages in discussions related to Global Health and Health Diplomacy. Her primary concentration lies in global environmental policies and multilateral agreements, particularly in areas such as climate change, biodiversity loss, pollution, and their health ramifications. Over the years, she has fulfilled roles as a researcher, lab manager, postgraduate professor, and science teacher in public schools of Rio de Janeiro.


Haley Campbell, MPH

Project Director

Haley Campbell is the Project Director at the Global Consortium on Climate and Health Education. She received her Bachelor of Science in Environmental Science from the University of Oregon. She then earned her Master's of Public Health at Columbia University in Environmental Health Sciences with a specialization in Climate Change and Health. Haley supervises GCCHE educational programs, offerings and provides strategic support to GCCHE constituent member organizations. Additionally, she assists in the coordination of the GCCHE working groups and partakes in climate and health education scholarly research through the Consortium. She is passionate about environmental justice, sustainability and engaging with healthcare professionals through climate change education and activism.


Dr. Hertelendy, PhD, MHA, MS

Environmental Health Sciences, Adjunct Associate Professor

Dr. Hertelendy has over 28 years leadership experience as a hospital administrator and executive in Saudi Arabia, UAE, Canada and the USA, with a background in disaster and emergency management. Dr. Hertelendy is an Adjunct Associate Professor of Environmental Health Sciences at Mailman School of Public Health. Dr. Hertelendy teaches leadership and healthcare management in the MBA program at Florida International University in the College of Business. He is working to raise awareness internationally and educate healthcare executives towards decarbonizing the healthcare sector.

Dr. Hertelendy's research interests explore healthcare resiliency and the intersection between climate change health and disaster medicine. He studies the health implications of climate change and how technology can be used to improve both the delivery and sustainability of healthcare during disasters. He is the author of more than 80 published articles, in leading healthcare and management journals such as Harvard Business Review, numerous book chapters, and is the Guest Editor for the Journal of Emergency Management, Journal of Public Health, Associate Editor for Disaster Medicine and Public Health Preparedness and is on the editorial boards of Prehospital and Disaster Medicine. Dr. Hertelendy is also the Co-Research Director for the Disaster Medicine Fellowship at Beth Israel Deaconess Medical Center.

He is a frequent international keynote speaker on crisis leadership, disaster and emergency management, global health security and climate change.


Jeffrey Shaman, PhD

Faculty Advisor

Jeffrey Shaman is a Professor in the Department of Environmental Health Sciences and Director of the Climate and Health Program at the Columbia University Mailman School of Public Health.  He studies the survival, transmission and ecology of infectious agents, including the effects of meteorological and hydrological conditions on theses processes.  He uses mathematical and statistical models to describe, understand, and forecast the transmission dynamics of these disease systems and to investigate the broader effects of climate and weather on human health.


Kim Knowlton, PhD

Faculty Advisor

Kim Knowlton is a senior scientist and deputy director of the science center at the National Resource Defense Council and Assistant Professor in the Climate and Health Program at Mailman School of Public Health. Kim Knowlton focuses on the public-health impacts of climate change and advocates for strategies to prepare for—and prevent—these impacts, especially in vulnerable communities. As a result of her research into the links between climate change and health, NRDC has partnered with a number of city and state governments to strengthen health preparedness in their climate adaptation planning. She has also studied heat- and ozone-related mortality and illness as well as the connections among climate change, infectious illnesses, flooding, aeroallergens, and respiratory ailments such as allergies and asthma. Knowlton was a co-convening lead author on the Human Health chapter of the Third U.S. National Climate Assessment report, and among the researchers who participated in the second New York City Panel on Climate Change. She holds a bachelor’s degree from Cornell University, a master’s in environmental and occupational health sciences from Hunter College, and a doctorate in public health from Columbia University’s Mailman School of Public Health—where she now serves as an assistant professor in the Climate and Health Program of the Department of Environmental Health Sciences. She is based in New York City.


Hannah Weinstein, M.D. Candidate 

GCCHE Student Fellow 2024-2025

Hannah is a fourth-year medical student at Columbia University Vagelos College of Physicians and Surgeons (VP&S). She has been passionate about the intersection of equity, health, and the environment since her days advocating for sustainable investments at Williams College and working in a no-waste food kitchen in the Netherlands. Prior to medical school she completed a B.A. in Biology and worked in cancer biology for multiple years. She is a former co-leader and current member of the VP&S chapter of Medical Students for a Sustainable Future. She has published on health center preparedness for climate change and is part of the current climate health initiative at VP&S, working to integrate climate education into the curriculum. She is also a current Steve Miller Fellow, awarded to support the integration of climate health education into the VP&S clinical curriculum. Outside of medicine, Hannah likes to dabble in film photography and pottery, and bike around New York City. 


Kristie Hadley M.D.

Project Director

Dr. Kristie Hadley is an emergency physician at Columbia University Medical Center and a program manager at the Global Consortium on Climate and Health Education. She completed fellowship training at Columbia University in Global Emergency Medicine where she earned a Master in Public Health, specializing in the global impact of climate change on human health. Previously, she worked as a fellow with the Department of Health and Human Services in the Office of Climate and Health Equity. In her work, she focuses on the intersection between climate change, environmental degradation, food security, and migration with an emphasis on social justice, both in the US and globally.


Adesh Sundaresan, M.B.B.S. Hons., BSc

Director of Media and Communications

Adesh Sundaresan is a medical doctor from London, UK. He received his medical degree with an intercalated BSc in Neuroscience from University College London. He was appointed as an Honorary Clinical Teaching Fellow at UCL Medical School in 2020 and pioneered a student selected course on Climate, Health and Sustainability. He has been working with Skewb Climate to empower and inspire school children about climate change across the UK through innovative digital education initiatives. Adesh has a wide range of interests, and is an award-winning professional Indian classical vocalist, having performed across India and the UK. He has experience presenting radio and television programmes for platforms including Resonance 104.4FM, BBC1 and the Soil Association.

Avriel Rose Diaz

Research Fellow 

Avriel M.A. is the co-founder and Executive Director of the international NGO, Walking Palms Global Health, and has spent years devoted to co-developing and co-creating international transdisciplinary partnerships building community resilience on the frontlines of climate change and variation in Latin America and the Caribbean.


Elizabeth Auld, M.D.

Climate and Health Science Policy Fellow

Dr. Elizabeth Auld is an Emergency Medicine Physician working in Seattle, WA.  She completed her undergraduate degree at Middlebury College where she majored in Environmental Science and Anthropology. During this time, she discovered her interest in the intersection between environmental and human health.  She received her MD from University of Washington, and completed residency training in Emergency Medicine at New York University where she served as chief resident in her final year.

She is a 2022-2023 Climate and Health Science Policy fellow at the University of Colorado. As part of the fellowship, she is working as a physician fellow at both the CDC’s Climate and Health Program and the Global Consortium on Climate and Health Education.


Natasha Sood, MPH


Natasha Sood is a 4th year medical student at Penn State College of Medicine. She completed her Bachelor of Science in Environmental Science from the University of Michigan. She then earned her MPH at Columbia University in Environmental Health Science with a specialization in Climate Change and Health. She is a Founding Leader and current Executive Chair of Medical Students for a Sustainable Future (MS4SF).

Gina A. Friel, DNP, CRNP-PC

Global Nurses Working Group Director

Gina is a Pediatric Nurse Practitioner at Annapolis Pediatrics, a large primary care pediatric practice in Annapolis, Maryland where she provides care to pediatric patients from birth through 21 years of age. Dr. Friel received her Doctor of Nursing Practice degree from Villanova University Fitzpatrick College of Nursing in December 2021 and is very excited to walk in the graduation ceremony in May 2022 along with her oldest son, Samuel, who will also graduate from Villanova University College of Engineering with a Bachelor of Science degree in Civil Engineering. 

Dr. Friel has a particular interest in pediatric obesity and fostering healthy lifestyle habits in patients of all ages. The focus of her doctoral work centered on the Pediatric Obesity and Food Insecurity Paradox. Dr. Friel’s interest in childhood obesity is further expanded by her equally passionate focus on the impact the environment has on eating patterns that ensure food security, improve human health and wellbeing, diet quality and social equity. The intersection of environmental exposures, climate change challenges and the engagement of people, communities and diverse groups is an area of interest. This passion stems,  in part, from living on the shores of the Chesapeake Bay, an experience that has further expanded her passion for understanding the vulnerabilities pediatric patients and families face related to climate change. 


Nico Hamacher, MPH 

Program Assistant

Nico Hamacher is a 2nd year MPH student at Columbia University’s Mailman School of Public Health where he focuses on the human impacts of climate change. He previously received his undergraduate degree from Quest University in British Columbia, Canada where he focused on disaster response and public health leadership. In the past, Nico has worked in a number of prehospital medical roles ranging from search and rescue coordination, general EMS services, and other austere medicine positions. His primary interests center on the intersections of public health, climate change, and emergency medicine – all of which he hopes will inform aspects of his work while at the consortium.


Michelle DePhillips, DNP

GCCHE Nurses Fellow

Michelle DePhillips is currently an Assistant Professor in the School of Nursing at the University of Delaware, where she herself completed her undergraduate degree. Michelle received her Doctor of Nursing Practice from the University of Virginia in 2017. Her clinical background is in emergency, critical care, and palliative nursing. Throughout her experience providing direct patient care, she realized how important public health is in addressing the structural, environmental, and social barriers to health and wellbeing. Michelle is currently enrolled in the Master of Public Health program at the George Washington University Milken Institute School of Public Health and is expected to graduate in Fall 2024. She hopes to integrate concepts of climate and health into nursing courses and inspire health professionals to promote positive change in the community. Michelle particularly enjoys appreciating nature by hiking with her family and Bernese Mountain Dog.

Learn More

Become a Member of the Global Consortium on Climate and Health Education Contact us for more information.