Abstract: Exoplanet group in Ondrejov, CZ was founded in 2016. The astronomical Institute Ondrejov operates a 2-m telescope equipped with an Echelle spectrograph. In the seminar an overview about the potential of our ground based support program for exoplanetary missions will be presented. Furthermore, our institute in cooperation with Tautenburg Observatory and Universidad Catolica de Chile plans to design a new spectrograph for 1.52m telescope at ESO La Silla observatory, Chile which should contribute to candidate vetting process for PLATO in the future and perhaps for TESS. As an additional program, we are working on characterization of exoplanetary atmospheres which will be also briefly presented in the seminar.