https://jobs.co.uk/job/data-ontologist-teksystems--1bce5ed6-dff6-4223-9dec-77f65b885c94 RSS feed for Data Ontologist at TEKsystems. en-gb Wed, 10 Jun 2026 15:02:10 GMT https://jobs.co.uk/job/data-ontologist-teksystems--1bce5ed6-dff6-4223-9dec-77f65b885c94 https://jobs.co.uk/job/data-ontologist-teksystems--1bce5ed6-dff6-4223-9dec-77f65b885c94 Tue, 09 Jun 2026 11:52:54 GMT Location: London | Salary: 10000-500000 Annual | Type: Contract | We''re hiring a contract Ontologist to design ontologies that help build out new AI domains within the business. This role focuses on developing semantic models and knowledge structures, helping shape how internal knowledge gets used by AI agents in product, data and global markets. Responsibilities:Design ontologies from scratch that represent core business concepts and relationships across contexts, constraints and inference patterns, approaches to reasoningStructure knowledge for GraphRAG and Search from unstructured artifacts (documents, transcripts, reports, glossaries ) as well as for assembling agent contextWork with engineers to determine how ontology gets queried, connected and reasoned overProduce design review artifacts and model documentationValidate, test against use cases, queries and workflowsEstablish maintenance process and build governance layerRequired Skills: Experience in ontology Experience with semantic standards (RDF, OWL, SHACL, SPARQL) Experience using ontology management platforms Experience with AI systems Experience with Large Language Models (LLMs)NLP knowledgeAware of how ontologies feed into AI systems and how agents retrieve and use structured conte... Contract