Dr. Sarah Preheim

Associate Professor

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Biography

Sarah Preheim is an Associate Professor in the Department of Environmental Health and Engineering at Johns Hopkins University. She serves as the director of the Preheim Lab, focusing on microbial ecology as it relates to engineering applications. Preheim's research interests include environmental microbiology, microbial ecology, and bioinformatics, specifically studying microorganisms that impact water quality in lakes, estuaries, and coastal oceans. Her work aims to inform remediation strategies through a combination of field sampling, laboratory experiments, and computational analysis. Preheim earned her Bachelor of Science in Biological Sciences from Carnegie Mellon University in 1997 and completed her PhD in Biological Oceanography through the Joint Program of the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution in 2010. Her graduate research concentrated on the population structure of Vibrionaceae in the coastal ocean while working alongside Professor Martin Polz in the Civil and Environmental Engineering Department. Subsequently, Preheim was a postdoctoral associate in the Biological Engineering Department at MIT under Eric Alm from 2010 to 2014 before joining the faculty at the Whiting School of Engineering.

Research Interests

Requirements for Johns Hopkins University

Doctorate Program
Requirements
GPA Requirement
Required:3
TOEFL
Total
Required:100
IELTS
Overall
Required:7
Prerequisites
Bachelor's degree Inorganic Chemistry with Lab Organic Chemistry with Lab General Biology with Lab
Application Checklist
  • Online application
  • Official transcripts
  • CV
  • Personal statement
  • Three letters of recommendation
Specialization Notes

Department of Pathology - PhD in Pathobiology. GRE is not required.