Semiconductor Engineer in 1947: The first transistor is demonstrated at Bell Labs

A semiconductor engineer designs, builds or manufactures the integrated circuits that run almost every powered object on Earth, from a car's brakes to a nuclear-armed missile's guidance system. The work splits broadly into two camps: design engineers who lay out circuits in software and hand off a finished blueprint, and process or device engineers who run the physical factories, called fabs, that etch those blueprints into silicon a few atoms at a time.

The profession is younger than most on this site — the first working transistor was demonstrated in 1947 — but it has become one of the most consequential. A handful of companies, concentrated in a handful of places, now control the machines and know-how needed to make the most advanced chips, and every government with a stake in artificial intelligence, defense or economic growth has decided that matters enormously.

That concentration is what makes this job unusually high-stakes. A single Dutch company builds the lithography machines advanced chipmaking depends on; a single Taiwanese company fabricates the large majority of the world's most advanced logic chips; and export-control rules written in Washington now shape which countries an engineer can legally sell equipment or expertise to. Few engineering careers sit this close to great-power politics.