[1] After completing his studies in 1979, Chang undertook research in La Jolla and Carlsbad, California.
[1] In 1986, Chang was appointed a professor of physics at the Korea Advanced Institute of Science and Technology, and concurrently held a research professorship at New York University's Courant Institute of Mathematical Sciences from 1988.
[1][2] He became a research physicist at Princeton Plasma Physics Laboratory in 2011, and retained a joint professorship at KAIST.
[1][3] While at New York University, Chang was elected to fellowship of the American Physical Society in 2006, "[f]or seminal and pioneering contributions in neoclassical, rf-driven, and basic transport theories, and for his leadership in plasma edge simulation in toroidal magnetic confinement devices.
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