Applied Practice Experience (APEx)

Environmental Health Sciences Master's students are required to complete a three-month practicum. The practicum—essentially an internship in the field—is both a required component and highlight of the Master's experience. Our students work alongside public health professionals, experience the day-to-day realities of the field, and apply what they’ve learned in class to advance the cause of public health.


  • Catalent Pharma Solutions
    Completing hazardous waste inspections and conducting risk assessments on various processes and their potential hazards
  • Civilience Company
    Developing questionnaires for the top 50 infectious diseases and creating a logic mapping for software development
  • The Collaborative for Women's Environmental Health at Columbia
    Researching patient and clinician education for women's health and environmental exposures
  • Columbia University
    Performing noise monitoring throughout Inwood and Washington Heights, then creating data visualizations
  • Columbia University and Natural Resources Defense Council
    Using R to analyze exposomics and access the relationship between CBD oil products and common environmental contaminants through data analysis and visualization
  • Environmental Health Sciences Department, Mailman School of Public Health
    • Translating questionnaires about arsenic exposure and rice consumption
    • Analyzing data to identify potential metabolomic signature related to exposure to metals and development of asthma
    • Studying the behavior and metal acclimation in the body of mice exposed to e-cigarettes
    • Geo-mapping environmental reparations cases using R, then developing a dashboard app
    • Analyzing the links between malnutrition and heat stress tolerance
    • Analyzing data and creating visualization using R for the Laboratory of Precision Environmental Health
    • Writing R code to create a tool that communicates lead concentration data in Public Water Systems to residents
    • Optimizing a protocol for urinary extracellular vesible isolation in order to study kidney disease biomarkers in samples from Sri Lankan children experiencing heat stress
  • The Farmworker Association of Florida, Inc.
    Conducting research on culturally competent care for migrant farmworkers with a focus on environmental and occupational exposures
  • Harvard University
    Interpreting data and writing a manuscript
  • Maximon Behavioral Health
    Reporting on productivity data and daily incidents
  • New York League of Conservation Voters
    Analyzing lead contamination reports for public school drinking water outlets
  • New York Presbyterian
    Literature analysis to determine effects of hospital visitors on the patient's risk of malnutrition
  • New York State Attorney General Office
    Aiding legal investigations by providing scientific expertise to lawyers and other professionals
  • NGO Sustainability
    Maintaining a newsletter on climate change, sustainable development, renewable energy, and environmental health
  • The Rockefeller Foundation
    Co-authored a paper and served as a content editor, focusing on biomolecules in food and their impact on nutrition and health
  • TreePeople
    Geocoding spatial soil data from fine satellite imagery to create maps of social and impervious surface in urban LA
  • WE ACT for Environmental Justice
    • Developing youth education modules to teach young people about environmental justice topics
    • Communicating about hazardous chemicals to avoid in cosmetic products
    • Coding for an R Shiny interface on air quality monitoring and wrote a policy paper on bioplastics and environmental justice
  • Wellness Equity Alliance
    Environmental health research for a Community Health Needs Assessment


  • Arch Street Communications
    Communication and public engagement for environment-related projects
  • Biostatistics Department, Columbia University
    Concussion protocol data collection and analysis
  • Brightline Defense
    Analyzing climate data and policy
  • Citizens Climate Lobby
    Community-based climate advocacy
  • Clarity Movement Co.
    Project management and climate data and policy analysis
  • Climate Club
    Developing science blog posts, creating visualizations, increasing readership and discovering grant opportunities
  • Columbia Center for Children's Environmental Health, Mailman School of Public Health
    Researching consequences of prenatal exposure to environmental contaminants on child health outcomes
  • CUNY Urban Food Policy Institute
    Applying an intersectoral perspective that links nutrition and health to a sustainable community for Harlem, and engaging the public in food policy research and action
  • Doctors Without Borders/Medecins Sans Frontieres Brazil Medical Unit
    Developing surveys to analyze the relationship between climate events, migration and health
  • Department of Immigrant Health and Cancer Disparities, Memorial Sloan Kettering Cancer Center
    Food pantry site distribution, data collection and analysis
  • Environmental Health Sciences Department, Mailman School of Public Health
    • Troubleshooting protocols for aerosol collection and immunostaining of various target organs with markers present in ALS patients
    • Determining the impact of metal exposures on child neurodevelopment
    • Data management and analysis, updating recruitment statistics
    • Investigating the relationship between wastewater surveillance data and underlying rates of infection
    • Collecting and analyzing data for the "450K Epigenome-Wide Scan Identifies Differential DNA Methylation Related to Aflatoxins Exposure" project
    • Measuring environmental noise
  • Environmental Protection Agency
    Clean Water Act (CWA) inspections and developing new enforcement cases against CWA violators
  • Environmental Working Group
    Researching projects surrounding the Farm Bill and Trade Policy
  • Environmental Volunteers
    Managing research, community engagement and communications for an environmental science education program for 1st and 2nd-grade students in low-income communities
  • Global Consortium on Climate Health and Education
    Educating the public and analyzing data about climate change and its impact on human health
  • ICAP Global Health
    Examining how mobility influences access and utilization of care for migrants living with HIV in Zimbabwe and Lesotho
  • National Center for Disaster Preparedness
    Pandemic planning course curriculum development