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GEM’s Paul Henshaw, Director of Technology and Development, delivered a presentation titled “OpenQuake: informing Disaster Risk Reduction Policy through open and collaborative Earthquake Risk Assessment” during the 4th INQUIMUS workshop held from 19th-21st September at Eurac Research, Bolzano, Italy. The organizers - the Department of Geoinformatics-Z_GIS at the University of Salzburg, Austria and the European Academy of Bozen/Bolzano (EURAC) - selected GEM’s presentation as one of the state-of-the-art talks (SOTA) for this year’s theme: “INQUIMUS into ACTION - How can scientific assessments inform decisions for problem-solving in practice”. Paul discussed how GEM promotes an integrated understanding of earthquake risk through a 3-step scientific framework composed of seismic hazard, physical risk and social vulnerability assessments using the OpenQuake engine - GEM’s state-of-the-art seismic hazard and risk computational software. He also emphasized the role of the OpenQuake Platform - a website that provides access to software, datasets, models and guidelines - on how these open tools and a collaborative approach promote stakeholder engagement and encourages risk mitigation actions. In addition, the presentation also highlighted GEM’s strategy of engaging end-users from the very beginning to ensure local conditions are reflected and outputs align with the needs of the local communities. During the discussion on how GEM used open tools to inform and contribute to the improvement of public policy, Paul said, “Throughout our work at GEM, the combination of open data, open models and open-source software have resulted in a powerful integrated workflow that permits transparent and repeatable calculations important not only for scientific credibility, but also for facilitating regulation compliance and community collaboration." The 4th INQUIMUS workshop also featured the works and experiences from the Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ), The Swedish Civil Contingencies Agency and the Federal Office of Civil Protection and Disaster Assistance, Germany (BBK).