On 4 March 2015, Caterina Caracciolo of the United Nations Food and Agriculture Organization (FAO) and Armando Stellato of the University of Rome Tor Vergata, will present a webinar on VocBench, a web-based platform for the collaborative maintenance of multilingual thesauri. VocBench is an open source project developed through a collaboration between FAO and the University of Rome Tor Vergata. VocBench is currently used for the maintenance of AGROVOC, EUROVOC, GEMET, the thesaurus of the Italian Senate, the Unified Astronomy Thesaurus of Harvard University, as well as other thesauri. VocBench has a strong focus on collaboration, supported by workflow management for content validation and publication. Dedicated user roles provide a clean separation of competencies ranging from management aspects to vertical competencies in content editing such as conceptualization versus terminology editing. Extensive support for scheme management allows editors to fully exploit the possibilities of the SKOS model including fulfillment of its integrity constraints. VocBench is open source software since publication of version 2--open to a large community of users and institutions supporting its development with their feedback and ideas. During the webinar Dr. Caracciolo and Dr. Stellato will demonstrate the main features of VocBench from the point of view of users and system administrators, and explain in what ways you may join the project. Additional information about the webinar and access to registration is available at http://dublincore.org/resources/training/#2015stellato.