Senior Ontologist - Knowledge Graph & Identity

About the role

This senior role owns the semantic models, ontologies, and SHACL validation that underpin a large media knowledge graph, including derived attribute definitions and governance. The hands-on work involves SPARQL, Python pipelines, entity resolution, and working with Spark-based data teams plus embedding and LLM methods. Candidates need 5+ years in ontology or knowledge graph work and strong W3C standards expertise.