The Access Risk Knowledge (ARK) Platform supports socio-technical analysis for clinical risk management using the Cube methodology. The platform leverages Semantic Web technologies and W3C standards to model, classify and integrate qualitative clinical risk management data with quantitative operational data and analytics in order to create a unified model of risk. This makes large-scale evidence collection and risk analysis more tractable by transforming human-oriented quantitative risk information into structured data. The risk model, or knowledge graph, is expressed using the ARK Cube Ontology and the ARK Platform Vocabulary, as well as the ARK Risk Terminology, the ARK Health Terminology and the Hospital Adverse Incidents Categories and Subcategories Terminology (HAdvInCats). Health and safety experts can interact with the platform via a web application which provides a user interface (UI) that guides users through the multi-dimensional Cube system analysis and risk mitigation project analysis. The UI also facilitates the interlinking of supporting evidence during the risk management process. ARK Evidence is a data catalogue of evidence that can be interlinked with risk management projects on the ARK Platform.