How to Become a Scientist: The Real Routes, Year by Year

Pick a field, earn a relevant bachelor's degree, and get lab, field, or computational experience. Then let the field decide how far up the degree ladder you go: some scientist jobs start with a bachelor's, while many research and academic roles expect a master's or doctorate.

What degree do you need to be a scientist?

The word "scientist" covers a wide set of jobs, and the credential follows the job. The Bureau of Labor Statistics, which tracks US occupations, lists typical entry-level education by occupation. These are typical routes; employers can set their own requirements.

A bachelor's degree is typical for microbiologists; chemists and materials scientists; environmental scientists and specialists; geoscientists; hydrologists; biological technicians; and forensic science technicians.
An associate's degree is typical for chemical technicians and agricultural and food science technicians.
A master's degree is typical for epidemiologists and computer and information research scientists.
A doctoral or professional degree is typical for biochemists and biophysicists, medical scientists, and physicists and astronomers.
Postsecondary teachers vary by subject and institution, and the typical route is a PhD.

That pattern is the practical answer. If you want to assist with research, run instruments, manage samples, or work in applied environmental and chemical roles, a bachelor's can be enough to enter. If you want to lead an independent research program, design experiments, or teach at a university, check the doctoral requirement for that field. The do you need a PhD? guide goes deeper, and PhD vs master's helps if you are deciding between the two.

A master's is often the flexible middle. It can be the final degree for some applied and computational roles, or a step toward a PhD. It also costs time and money, so compare it with entering a bachelor's-level job and learning on the payroll.

What are the stages from school to a science job?

Start with the subject you can study for several years without losing interest. In school, build math, writing, and basic lab or field skills. In university, take the core science sequence and the labs that go with it. A science degree is not only a list of courses; the lab and field work are where you learn how research actually runs.

Get research experience early. That can be a lab assistant job, a summer project, a field assistant role, a computational project, or a technician post after graduation. Ask what the day-to-day work is like before you commit to a long degree. The fields overview can help you compare areas, and what a scientist does shows the work behind the job titles.

Then decide on the next degree. For some roles, a bachelor's plus experience is the entry point. For others, a master's is the final degree or a step toward a PhD. If you want a research career in a field that expects a doctorate, plan for the PhD and the years it takes. Treat the PhD as a requirement for the work you want, not as a default badge.

After the degree, the first job might be a technician, research assistant, analyst, lab manager, field scientist, or postdoc. A postdoc is a temporary research job after the doctorate, common in academic lab fields. Ask whether your target field uses them and how long they usually last. The route is a series of decisions about field, credential, and experience.

How long does a PhD take, and when do you need one?

The federal Survey of Earned Doctorates for 2025 gives a clear timeline for research doctorates. The median recipient in science and engineering took 8.0 years from bachelor's degree and 5.7 years from starting the doctoral program. Field medians vary: physical sciences took 6.8 years from bachelor's, and health sciences took 11.0 years from bachelor's. Use how long a PhD takes if you are weighing the time commitment.

The gap between those measures matters. The time from bachelor's includes any work, master's study, or time away before the doctorate. The time from starting the program is closer to the degree itself. Neither number is a promise for your case; they are medians for people who finished.

A PhD is usually needed for independent academic research and for the doctoral-level occupations listed above. It is not the only way into science. Many people build useful careers with a bachelor's or master's and years of lab, field, or computational experience.

What changes if you are in the UK?

The National Careers Service describes the UK route into research scientist work as a first or 2:1 in a science subject, usually followed by a postgraduate qualification such as a PhD. It lists alternatives: a degree or a Research Scientist Level 7 apprenticeship, or starting as a research assistant and studying part time for a PhD. That matters if you need to earn while you qualify or if you already have technical experience.

UKRI says funding for full-time studentships usually lasts between three and four years. Treat that as the funding window, and check the project terms, fees, and visa conditions for your own case before you apply.

What to do next

Pick a few fields and read real job ads in your area. Note the degree and experience they ask for.
Get concrete research experience before you commit to a long degree. A lab assistant, field assistant, summer project, or computational project will tell you more than a job title.
Check the degree ladder for your target field. If you are choosing between a master's and a doctorate, write down what each credential is for and what it costs in time.
If you are in the UK, compare the National Careers Service routes and UKRI studentship terms before you apply.