Public health majors study what keeps populations healthy and go on to work in a wide range of roles, from tracking disease outbreaks to designing community wellness programs to shaping health policy. Unlike clinical healthcare degrees that focus on treating individual patients, a public health degree trains you to think at the population level: identifying health threats, analyzing data, and building systems that prevent problems before they start.
What You Study as a Public Health Major
Public health programs are built around a few core disciplines. At the University of Michigan’s School of Public Health, for example, the undergraduate curriculum covers public health systems, population health determinants and disparities, data-driven problem solving, and a capstone course focused on creating real-world change. These core courses give you a foundation in how health systems work, why certain communities get sicker than others, and how to use data to design solutions.
From there, programs typically branch into two tracks. A Bachelor of Arts track leans toward community and global health, covering topics like social justice in public health and global health challenges. A Bachelor of Science track is more science-heavy, with coursework in biology, pathophysiology, environmental health, nutrition, and even public health genetics. Both tracks usually require a culminating experience, such as a practicum or fieldwork placement, where you apply what you’ve learned in a professional setting.
Common Career Paths
Public health is unusually broad as a field, which means graduates spread across many different job titles. The most common entry-level roles fall into a few categories:
- Health education and community health. Health educators, community health workers, and health communication specialists. These roles focus on teaching people healthy behaviors, developing wellness programs, and connecting communities with resources.
- Data and research. Epidemiologists, biostatisticians, program evaluators, and clinical research coordinators. These roles center on collecting and analyzing health data to understand disease patterns and measure whether interventions work.
- Policy and administration. Health policy analysts, healthcare administrators, public health planners, and healthcare policy advocates. These professionals shape the rules, funding, and organizational structures behind health systems.
- Environmental and occupational health. Environmental health specialists, occupational safety officers, water quality specialists, and industrial hygienists. These roles protect people from hazards in workplaces, water systems, and the broader environment.
What Health Educators Actually Do Day to Day
Health education is one of the most common landing spots for public health graduates, and the work is more varied than it sounds. According to the Bureau of Labor Statistics, health education specialists assess the health needs of communities, then design programs, materials, and events to address those needs. That could mean running a diabetes prevention workshop at a community center, creating a social media campaign about vaccination, or training other healthcare workers on how to deliver health information effectively.
A big part of the job is evaluation. You don’t just launch a program and hope it works. You collect data on participation and outcomes, analyze whether the program is actually changing behavior, and adjust your approach based on what the numbers show. Health educators also advocate for better health resources and policies, which means the role often blends direct community work with behind-the-scenes policy efforts. The median salary for health educators is $59,990.
What Epidemiologists Do
Epidemiology is the detective work of public health. Epidemiologists investigate patterns and causes of disease and injury in populations. They plan and direct studies of public health problems, collect data from observations, interviews, surveys, and biological samples, then analyze that data to find causes and risk factors. An epidemiologist might study demographic data to figure out which groups face the highest risk for a particular disease, or research treatment outcomes among cancer survivors to identify what works best.
The role demands strong statistical skills and comfort working with large databases and specialized software. Epidemiologists also monitor infectious diseases and bioterrorism threats for public health agencies. This is typically a role that requires a master’s degree, with a median salary of $78,520.
Where Public Health Professionals Work
Public health graduates don’t all end up in the same type of organization. The field spans government agencies (like state health departments and the CDC), nonprofit organizations, hospitals and health systems, private companies, and international organizations. A look at recent employers of UC San Diego public health graduates illustrates the range: the California Department of Public Health, biotech companies like Genentech and Illumina, community service organizations, physical therapy clinics, data analytics firms, and child and family advocacy groups like First 5 California.
This variety is one of the degree’s strengths. Your day-to-day work looks completely different depending on the setting. A public health analyst at the CDC conducts studies related to the planning, development, and evaluation of public health programs. An environmental health specialist at a local agency might inspect restaurants and water systems. A health policy analyst at a think tank might spend most of their time writing briefs and modeling the effects of proposed legislation.
Global Health Roles
For those drawn to international work, public health opens doors to global health careers. The CDC alone runs several programs that deploy public health professionals overseas. Its STOP Program recruits and trains consultants who strengthen disease surveillance, support immunization campaigns, respond to outbreaks, and support polio eradication efforts around the world. The Public Health Informatics Fellowship places professionals with international agencies to solve data and technology challenges in resource-limited settings.
Global health roles can involve anything from coordinating humanitarian aid during a crisis to advising foreign governments on health policy to managing infectious disease control programs. These positions often require a graduate degree and some domestic experience first, but an undergraduate public health degree is a direct pipeline into that trajectory.
How a Bachelor’s Compares to a Master’s
A bachelor’s degree in public health qualifies you for entry-level positions, but many of the higher-responsibility roles in the field require or strongly prefer a Master of Public Health (MPH). The salary gap is significant. Community health workers with a bachelor’s degree earn a median of $46,190, and health educators earn $59,990. By contrast, epidemiologists with graduate training earn $78,520, biostatisticians earn $130,308, and global health specialists earn around $105,000.
Beyond salary, an MPH builds advanced skills in research methods, policy analysis, leadership, and epidemiology that open doors to supervisory and managerial roles. Many public health professionals work for a few years after their bachelor’s degree, then return for a master’s with a clearer sense of which specialization fits them. Environmental health is a notable exception to the graduate-degree expectation: environmental health specialists earn a median of $76,480 and can often enter the field with a bachelor’s degree.
Professional Certifications
The main credential in the field is the Certified in Public Health (CPH) designation, administered by the National Board of Public Health Examiners. Students in accredited graduate programs can sit for the exam before graduation, receiving provisional certification that converts to full certification once they complete their degree. If you don’t have a graduate degree from an accredited program, you can still qualify with a bachelor’s degree in any field plus five years of public health work experience, or a relevant graduate degree plus three years of experience.
Other specialized certifications exist for disease intervention, public health nursing, and public health informatics. While certification isn’t always required for employment, it signals a standardized level of competency and can give you an edge in competitive hiring processes, particularly at government agencies.