Research Assistant at Department of Wood Science, Mendel University in Brno (CZ). Ph.D. in urban tree physiology. Managing director of company SAFE TREES, Ltd. and a forensic expert in the area of tree risk assessment and tree value calculation. Coordinator of the project "Standards for the Nature and Country Care". Vice president of the certification board of national program "Czech Certified Arborist”. Consulting arborist since 1991 and teacher of Arboriculture since 1999 (Czech Tree Acaademy, Melnik, Czech Agricultural University, Prague, Mendel University, Brno, Slovak University of Agriculture, Nitra). Author and editor of several books on tree care and tree assessment.