What an epidemiologist really does
You find patterns of illness in messy case data, track down the cause, and explain what people should do about it before the facts are complete.
FieldScience and engineering
Preparation (O*NET Job Zone)Extensive preparation needed
What the work involves
What fills a typical week for epidemiologists, built from O*NET occupation data.
- Review new reportable disease cases from labs and clinics and check them against normal levels
- Clean and analyze surveillance data in tools like Excel, R or Stata
- Interview sick people or design questionnaires when a cluster appears
- Write weekly reports and health alerts for clinicians, officials and the public
- Meet with the health officer, nurses and environmental health staff to plan an investigation
- Advise doctors and schools on prevention and control measures
- Work on longer projects such as study design, grant writing or a journal article
What the days are like
What people in the job know
- Precision is everything. A miscounted case or wrong date can change a public health decision. Importance of being exact or accurate: 68% extremely important (O*NET Work Context)
- The top rated part of the job is communicating, not calculating. Task 1 (importance 88): Communicate research findings on diseases to health practitioners, policymakers, and the public (O*NET)
- You get a lot of say over how you work, but long weeks are common. Freedom to make decisions: 58% a lot of freedom; Duration of typical work week: 53% more than 40 hours (O*NET Work Context)
- Crunch comes in waves rather than every day, usually when an outbreak or report deadline hits. Time pressure: 58% once a month or more but not every week (O*NET Work Context)
- The job is mostly office based, though some field contact with disease does happen. Indoors, environmentally controlled: 84% every day; Exposed to disease or infections: 50% once a year or more but not every month (O*NET Work Context)
How people get into it
O*NET places this in Job Zone 5. Most new hires hold a master's degree, usually an MPH or MS in epidemiology (67% of respondents); 22% report post doctoral training and 11% a doctoral degree. Many start as surveillance or field epidemiologists at a local or state health department, and some enter through fellowship programs.
The Firstday trial, easy to hard
Three simulated tasks with AI coworkers who message you, react to your work and coach with questions. Nobody scores you.
What the trial can't show: This trial does not cover in person field interviews, collecting specimens, lab work, the long timelines of research studies and grant cycles, or writing a full journal article. It uses fictional cases only and does not involve real patient data.
Reading about it is one thing.
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Job details on this page are built from O*NET OnLine, 19-1041.00. This page includes information from the O*NET 31.0 Database by the U.S. Department of Labor, Employment and Training Administration (USDOL/ETA). Used under the CC BY 4.0 license. O*NET® is a trademark of USDOL/ETA.