Research fields: PZT observations and their analysis, Earth orientation parameters (EOP) from optical astrometry and combination of the EOP series derived from different techniques, studies of nutation theories and some of the geophysical influences on nutation. 1981 graduated in Geodesy and Cartography from the Faculty of Civil Engineering of the Czech Technical University, Prague. Since 1983 at the Astronomical Institute. 1986 three-month mission to the Zentralinstitut für Physik der Erde in Potsdam, Germany. 1992 PhD in Astronomy. 1997-1998 mission to the Lohrmann Observatory, Technical University Dresden, Germany. Member of the Center for the Earth's Dynamics Research (CEDR) and of the IERS Combination Research Center. Since 2000 member of organizing committee of IAU Commission 19 (Rotation of the Earth). Member of team awarded the prize of Academy of Sciences of the Czech Republic in 2000.