What was Albert Einstein's profession?

Albert Einstein's profession was theoretical physicist. He studied the fundamental laws of nature through mathematics and thought experiments, rather than working primarily in a laboratory. His best-known achievements include special relativity, general relativity, and major contributions to quantum theory.

Einstein graduated from Zurich Polytechnic in 1900 and later earned a doctorate from the University of Zurich. Before becoming a famous professor, he worked at the Swiss Patent Office in Bern, where reviewing inventions gave him time to pursue physics. His celebrated 1905 papers addressed relativity, Brownian motion, and the photoelectric effect.

Einstein is often called simply a “scientist” or “physicist,” but “theoretical physicist” is the most precise answer. He was not chiefly an engineer, chemist, or mathematician, although his work relied heavily on advanced mathematics and influenced engineering and chemistry.