Dr. Andreas Kleiner is a staff research scientist in the NSTX department working on magnetohydrodynamic modeling of fusion plasmas. After obtaining his Master's degree from the Technical University of Darmstadt (Germany) in 2014, he completed his PhD at the Swiss Federal Institute of Technology in Lausanne (EPFL) with a thesis entitled "Non-linear modelling of saturated internal and external MHD instabilities in tokamaks." He joined PPPL in 2019. Dr. Kleiner studies magnetohydrodynamic instabilities in tokamak plasmas using advanced codes such as M3D-C1. He is particularly interested in instabilities related to the edge pedestal in spherical tokamaks, and is working on a model to predict edge-localized mode onset in compact fusion devices. Futhermore, he is developing equilibrium variation methods for stability analysis of tokamak discharges. He has also investigated disruption mitigation strategies using extended-MHD simulations.