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.


  • 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