Yabi Bereket
Yabi Bereket was a Senior at Virginia Tech working towards a Bachelor of Science degree in Public Health, with a double minor in International Public Policy and Data & Decisions. Following the completion of her undergraduate studies, she plans to further her education by pursuing a Master’s degree, with a focus on exploring opportunities that allow her to combine her areas of interest, including global health and data analysis. She enjoys utilizing these interests for the purpose of understanding and improving health and overall quality of life outcomes for different global communities. Yabi graduated from Virginia Tech in 2023. [last updated 2023]
Jingyi Cui
Jingyi graduated from the University of California, Berkeley in 2020 with double majors in Applied Mathematics and Economics. Jingyi currently works at the San Francisco office of Cornerstone Research. In her spare time, she also serves as a technical consultant for Delta Analytics to help their partner non-profits drive impact through statistical and machine learning analysis. [last updated 2020]
Arpita Das
Arpita Das was pursuing a B.S. in Public Health. She has worked at the Carey Lab since her freshman year focusing on understanding freshwater ecosystems while working specifically with Beaverdam and Falling Creek Reservoirs. She also worked at the Cohen Lab helping with a project focused on water bottle quality. Arpita is interested in pursuing an MPH in Epidemiology after graduating from Virginia Tech. [last updated 2023]
Madeline Deck
Madeline was a senior studying Civil & Environmental Engineering at Virginia Tech. After graduating, she plans to continue her education at Virginia Tech as a MS student in Environmental Engineering. Her research interests include drinking water treatment methods and their effects on public health. In her free time, she enjoys hiking, cooking, and puzzles. Madeline graduated in 2023 and is current a graduate student at Virginia Tech. [last updated 2023]
Rachel Guevara
Rachel graduated in the spring of 2022 from University of Virginia’s College at Wise earning her BS in Environmental Science with a focus on Geology. She has a passion for water quality monitoring, management, and equity especially in karst areas, and has participated in several research opportunities in Appalachia, mainly in Southwest Virginia. Apart from assisting in, and conducting her own, research, she enjoys volunteering for several outdoor projects, including the Clinch Water Watch Citizen Science Project and environmental cleanups on Natural Area Preserves along the Virginia Cave and Karst Trail. When she’s not in the field, in class, or in the lab, she can be found playing Dungeons and Dragons or reading a book. [last updated 2022]
Yalu Guo
Yalu studied Civil Engineering at the University of California, Berkeley as an undergraduate. She is currently a masters student at UC Berkeley, studying in Civil Engineering in the ECIC program (energy, civil infrastructure and climate). Her research interests are renewable energies and electric vehicles. In her free time, she enjoys stargazing, kayaking and cooking. [last updated 2020]
Ziyi (Jackie) He
Jackie graduated from the University of California, Berkeley with a B.S. in Statistics. She is interested in multiple areas of data analytics, statistics and computational finance. Jackie is currently working for Abbott Laboratories in their Finance Professional Development Program and plans to pursue graduate studies in the future. [last updated 2020]
Ethan Hessl
Ethan studied Molecular Environmental Biology at the University of California, Berkeley and focused his major on key relationships between the environment and human health. He grew up in Davis, CA, and wants to make a difference in environmental justice issues related to drinking water in the California Central Valley. [last updated 2020]
Jiexuan (Jess) Huang
Jess earned undergraduate degrees in Statistics and Economics at the University of California, Berkeley. Working with the Cohen Research Group she enjoyed using her data analytics skills in various research groups, including but not limited to bottled water contamination and unemployment rate fluctuation prediction. She is also a performer doing both ballet and modern dance. [last updated 2023]
Alvaro Hurtado
Alvaro is a senior at Virginia Tech, and he is currently pursuing his B.S. in public health. After completing his bachelors, he plans to obtain his MPH in epidemiology and biostatistics. Alvaro’s research interests include infectious diseases, water quality, rural health, and mental health. He plans to work in disease research in the future and keeping our society healthier. He enjoys to hike, exercise, watch football, watch movies, watch TV shows, and cooking [last updated 2025].
Sydney Jones
Sydney is a senior at Virginia Tech pursuing a BS in public health with a minor in chemistry. She will begin as a Chemistry PhD student at the University of Virginia in the Fall of 2025, and is interested in studying Chemical Biology to investigate how chemicals affect humans and our environment at a molecular level. She likes to spend her free time playing and coaching volleyball, reading and writing fiction, and hanging out with her friends [last updated 2025].
Pragya Khanal
Pragya is a senior double majoring in Mathematics and Economics at Hollins University in VA. She enjoys working with data to analyze real-world problems. Her research interest lies in the interdisciplinary fields of Public Policy, Gender, and Development Economics. During her spare time she enjoys reading and listening to music. [last updated 2021]
Breanna Lytton
Breanna studied Human Nutrition, Foods, and Exercise; Public Health; and Chemistry at Virginia Tech. She enjoyed working on Appalachian water quality research, as it provided an opportunity to interact with rural communities and serve the individuals within. In her free time, Breanna enjoys weightlifting, archery, kayaking, and hiking. Breanna graduated from Virginia Tech in 2023 and is currently attending medical school to become a Doctor of Osteopathic Medicine (D.O.). [last updated 2023]
Joshua McCray
Josh was an undergraduate student studying biochemistry and history at the University of Virginia (UVA) at Wise. His research interests range from organometallic ruthenium cage complexes to drinking water contamination and public health in the Appalachian region. In his free time, Josh enjoys hiking, kayaking, and volunteering with medical clinics. Josh graduated in 2023. [last updated 2023]
Nicole Obido
Nicole Odibo is a senior at Virginia Tech pursuing a BS in public health. She will begin as an MPH student at Columbia University in the Fall of 2025. Passionate about promoting health equity, she is driven to make a positive impact in underserved communities. She has a particular interest in water contamination and its effects on marginalized populations. In her free time, she enjoys spending time at the beach, scrapbooking, creating pottery, and making vlogs to capture and share moments from her life [last updated 2025].