Data Ontologist is required by a specialised data consulting organisation to join their team working on a large scale data governance programme and be responsible for designing, implementing, and maintaining ontologies and taxonomies that enable data integration, interoperability, and insight across multiple business domains. You will be responsible for: Designing and maintaining ontologies and taxonomies to support data integration and consistency across systems and functions. Translating complex technical or domain concepts into structured, machine-readable formats suitable for analytics, AI, and knowledge graph applications. Developing and promoting standards for data interoperability to enable seamless data exchange and integration across the organization. Ensuring data quality and consistency by implementing validation rules and ontology-driven quality checks. Using ontology development and data curation tools to design, build, maintain, and visualize ontologies, taxonomies, and controlled vocabularies. Applying enterprise data modelling and cataloguing tools to ensure alignment between metadata, ontologies, and business data assets. Supporting knowledge graph and graph database initiatives, ensuring ontologies underpin scalable, AI-ready data architectures. Collaborating closely with stakeholders to gather requirements and align ontological models with business objectives. Required experience and skills: Proven experience designing and managing ontologies and taxonom