My research deals with Doppler detection and characterization of extrasolar planets around main sequence and evolved intermediate mass stars such as G and K giants. Particularly, my scientific focus is studying the orbital stability of multi-planet systems using direct N-body simulations. My goal is to estimate more precisely the planetary orbital parameters purely by stability constraints and to understand the planetary formation and evolution. Besides the dynamical research, I am interested in a broad range of astronomical observational and data reduction techniques.