How to Choose a Career: A Method, Not Guesswork

The method that works here was published by psychologist John Holland in the Journal of Counseling Psychology back in 1959. Today it holds up O*NET — the U.S. Department of Labor's database of 900+ occupations. Not a horoscope, but half a century of testing.

Most people choose a career from the outside: on a parent's advice, off a list of "in-demand" jobs, or by copying someone they know who "made it work." The trouble isn't the advice itself — it's the direction of the gaze, which runs outside-in rather than the reverse. Where that leads shows up in the numbers. In the U.S., about a third of undergraduates change their major within the first three years (NCES, 2018): they picked by the cover, and the inside turned out to be someone else's.

A job title is packaging, not contents. Behind the word "lawyer" hide both quiet desk analysis and combat in a courtroom — two different people under one sign.

Why "who to become" is the wrong first question

Choose by the title and you're guessing at what's inside the box. And inside a single label, incompatible kinds of work often live side by side. It's far more accurate to first work out which actions pull at you — digging into how things are built, say, or working with people directly — and only then look for careers with plenty of that. This is the outside-in gaze flipped around, and it's where a sane choice begins.

What RIASEC is, and why it isn't a horoscope

RIASEC is the language John Holland proposed in 1959 for describing both people and occupations with one set of six interest types. When your set lines up with an occupation's, the work comes easier. Over half a century the model was tested across countries and ages, and today it underpins career guidance worldwide. The six types:

• R — Realistic: hands and machinery, a result you can touch. Mechanic, electrician, pilot.
• I — Investigative: data and the question "why." Analyst, diagnostician, research engineer.
• A — Artistic: form and vision. Designer, director, architect.
• S — Social: people, up close — to teach, to heal, to support. Teacher, psychologist, nurse.
• E — Enterprising: influencing and leading others. Manager, lawyer, founder.
• C — Conventional: order and precision. Accountant, logistician, data analyst.

What keeps the model grounded is O*NET — the database that replaced the U.S. Department of Labor's paper Dictionary of Occupational Titles in the late 1990s and now describes over 900 occupations. Each carries its own code, drawn from surveys of people who actually do the job. Your profile is laid over that database, and it shows you where the overlap runs highest. Since 1999, the same logic has powered the free O*NET Interest Profiler — 60 short "like it / dislike it" statements taken by millions of people.

Why interests are worth trusting at all

For a long time interests were treated as a pleasant detail that told you nothing useful about the future. The meta-analysis by Rounds and Su in Current Directions in Psychological Science (2014) showed the opposite: interests are stable dispositions, and they predict the schooling you choose, the work you choose, and how well that work will sit with you. From this comes a point often mistaken for sentiment — a fit with your interests is tied not only to success but to whether you stay in the field or leave it (Nye et al., 2012). Put plainly: people burn out faster in work they don't like.

Interests are half of it. The other half is values

Interests tell you what you like doing. Values tell you what for. The very same social interest sends people in different directions: one needs stability, another freedom, a third recognition. That's why good career guidance doesn't ask "does this matter to you?" — almost everyone says yes. It makes you choose between two values at once. Only in that kind of choice can you see what's genuinely a priority for you.

But what about salary?

Money isn't the first question, but it isn't the last one either. The order goes: first the direction, where you'll be good and won't burn out, then the reality check — how much it pays and how you get in. That's why in Astrolab every career comes with honest salary figures for your country and a path in. Interest leads you to a shortlist; the data helps you pick what you can realistically pull off.

Sources

1. Holland, J. L. (1959). A Theory of Vocational Choice. Journal of Counseling Psychology, 6(1), 35–45.
2. Rounds, J., & Su, R. (2014). The Nature and Power of Interests. Current Directions in Psychological Science, 23(2), 98–103. doi.org/10.1177/0963721414522812
3. Nye, C. D., Su, R., Rounds, J., & Drasgow, F. (2012). Vocational Interests and Performance. Perspectives on Psychological Science, 7(4), 384–403. pubmed.ncbi.nlm.nih.gov/26168474
4. National Center for Education Statistics (2018). Beginning College Students Who Change Their Majors Within 3 Years of Enrollment (NCES 2018-434). nces.ed.gov/pubs2018/2018434.pdf
5. O*NET (National Center for O*NET Development, U.S. Department of Labor): onetonline.org.

This material is educational and is not professional advice. The test result is an estimate based on the RIASEC model, not a diagnosis or a guarantee.