Choosing a STEM degree · one question that matters
You are not picking a job at seventeen. You are picking the set of jobs you can still reach at twenty-six without starting over.
This is not an argument for physics instead of engineering, or instead of business. It is an argument that one degree keeps all three within reach, while the narrower ones quietly pick for you at seventeen.
Mechanical, industrial and electronic each teach one branch of the methods. You learn the equations those branches grew out of, so you can walk back up when there is no handbook yet.
→ the case is in §03
Diffusion, stochastic processes and Monte Carlo are the working tools of quant finance, actuarial science and risk. You arrive already owning them, under different names.
→ the case is in §04 and §05
Consulting and founding both pay for one thing: taking a vague, badly posed problem and cutting it into parts you can actually put numbers on. That is a physics reflex, not an MBA technique.
→ the case is in §06
Walk through any one of the three later. The point is to still be able to choose at twenty-six, without starting over.
Both trips exist. They do not cost the same.
Take the steep path while someone else is paying for your time. You can always walk downhill later. Uphill has a schedule.
The other engineerings teach you the methods. This one teaches you where the methods came from.
On a standard problem, the specialist wins. On a problem with no handbook yet — a new sensor, a new process, a new material — somebody has to walk back up to the equations.
Where it costs you: the others arrive with CAD, shop practice and the norms (ASME, IEEE, NOM) already in hand, and a few regulated sign-offs are tied to a specific accredited title. If a particular job is your target, check which degree name it demands.
Physics and finance did not end up similar. They split from one root and are growing back together.
Black, Merton, Derman, Simons — the people who built modern finance walked in from physics and mathematics. Traffic runs that way. Ask yourself why.
Nobody in business will ever ask you to solve a wave equation. They will constantly ask you to put a defensible number on something nobody has measured.
A consulting case interview is a Fermi problem in a suit: estimate the market for this, no data provided, think out loud. McKinsey, BCG and Bain all run a separate advanced-degree track to hire physics and PhD candidates — they are buying the estimation habit, not the subject.
BS in physics, Pennsylvania, alongside a degree in economics. Tesla and SpaceX. The method he describes in public — reason down to first principles, then rebuild the cost from raw materials up — is the physics habit pointed at industry.
PhD in theoretical physics, Princeton. Became the first chief technology officer of Microsoft, then founded Intellectual Ventures.
PhD in mathematics and a serious geometer. Founded Renaissance Technologies and staffed it with physicists and mathematicians instead of financiers. Best returns in the history of the industry.
Engineering, MIT. Ran an industrial group and then founded the school you are sitting in. The quantitative degree was the starting point, not the ceiling.
Mechanical engineering, Tec de Monterrey, then Stanford. Turned CEMEX into a global operator by running it on data and systems long before that was normal.
Civil engineering, UNAM, where he taught algebra and linear programming. He has always described his edge as arithmetic and valuation, not salesmanship.
Read that list honestly: Musk and Myhrvold are physicists, the others are engineers and a mathematician. The transferable thing was never the title — it is being fluent with quantities in a room where everyone else is arguing with adjectives.
Every one of these is a good degree. They trade on the same axis.
Learning actuarial mathematics is fast. Passing the professional exams is years of work alongside a job.
That path converts a degree into a job more directly than physics does. Optionality is not the same as certainty.
If your instinct is algorithms and data rather than physical systems, go there. I am claiming a direction, not a winner.
A few regulated roles and legal sign-offs name a specific accredited engineering degree. Verify before you assume you qualify.
Nobody writes a memoir about the physicists who did not make the jump. Treat the names in §06 as possible, not as a plan.
Consulting and founding take any degree, so physics buys you no protection there. It is an edge inside the reasoning, not a credential anyone will check.
A versatile degree in passive hands just becomes a vague one. It pays only if you actually use it: code, exams, domain.
If you already have the head for actuarial science, you already have the head for Engineering Physics. The only question is which doors you want open.
AKZ