Isuru R. Ariyarathna is the Feynman Fellow at the Theoretical Division, Los Alamos National Laboratory. Before his current role, he was a Postdoctoral Associate at the Massachusetts Institute of Technology. He holds a Ph.D. in Chemistry and Biochemistry from Auburn University and a B.S. in Chemistry from the University of Peradeniya. His research interests include lanthanides and actinides, physical chemistry, and computational methods.