Bodo Siegert is a court-certified expert in tree care and tree statics in Nuremberg, Germany (www.sv-siegert.de). Head of the German association for arboriculture, work at height and ecology (BAHÖ e.V.), Bodo is involved in various national and international committees to develop urban tree care rules and regulations ensuring corresponding quality assurance. Focused on the continuous improvement of tree security examination, he established the Independent Tree Expert Group (ITEG), a network of international tree care experts pursuing an integrated tree assessment approach. He teaches at the Nuremberg School of Arborist Training for tree inspectors and experts in tree care and tree statics.