Linjin Zheng is a theoretical physicist for controlled thermonuclear fusion plasmas. He received his MS degree from The University of Science and Technology of China and PhD from Institute of Physics - Beijing, Chinese Academy of Sciences. He is currently a research scientist at Institute for Fusion Studies, The University of Texas at Austin. He has published more than one hundred scientific papers, and edited one and authored three books. His research covers ideal/resistive magnetohydrodynamics, two-fluid, and kinetic theories for both equilibrium and stability. His major contributions with his colleagues include the reformulation of gyrokinetic theory, the development of the perpendicular magnetofluid theory, the theoretical interpretation for the so-called edge localized modes, the invention of the free boundary ballooning representation, the discoveries of second toroidal Alfven eigenmodes and the current interchange tearing modes, etc. With his colleagues, he also developed the tokamak equilibrium code ATEQ and stability codes AEGIS and AEGIS-K.