Senior Semantic Engineer
Argus Media
A complete application in a minute
Tailored resume and cover letter, ready to send.
Benefits offered by this job
Job summary
Argus Media is seeking a Senior Semantic role to support enterprise semantic and ontology functions. You will work with the Ontology Manager to discover, analyse, transform, validate and publish semantic assets derived from enterprise data and external sources.
Responsibilities include semantic modelling, SPARQL and graph operations, entity mapping, and governance-focused validation. Collaboration with business and technical teams is essential.
Qualifications
- Experience with ontologies, taxonomies, metadata or knowledge graph solutions.
- Strong understanding of RDF/RDFS, SKOS, OWL, SHACL and Linked Data principles.
- Experience writing and optimising SQL and SPARQL queries.
- Experience using Python for data wrangling, transformation, automation and semantic processing.
- Experience with semantic libraries and frameworks such as RDFLib or similar technologies.
- Strong data analysis, profiling and data quality management skills.
- Experience cleansing, reconciling and transforming complex business datasets.
- Experience working with Git, GitHub and version-controlled asset management.
- Understanding of URI design, namespaces, semantic identifiers and reference data management.
- Strong analytical, problem-solving and investigative capabilities.
- Ability to communicate effectively with both business and technical stakeholders.
Responsibilities
- Semantic Discovery & Data Analysis: profile source systems and identify semantic opportunities.
- Concept Discovery & Knowledge Extraction: analyse sources to identify concepts and relationships.
- Data Wrangling & Semantic Preparation: cleanse and reconcile terminology and classifications.
- Semantic Asset Delivery & Knowledge Graph Enablement: develop RDF/OWL/JSON-LD representations and mappings.
- SPARQL & Graph Operations: develop and optimise SPARQL queries for knowledge graphs.
- Entity Resolution & Identifier Management: manage URIs and concept reconciliation.
- Semantic Validation & Quality Assurance: create SHACL rules and perform quality checks.
- Metadata & Semantic Operations: publish assets within governance platforms and maintain lineage.
- Semantic Asset Lifecycle Management: manage repositories with GitHub and CI/CD for semantic assets.
- Stakeholder Collaboration: work with domain experts to clarify terminology and classifications.
Skills
Tools
Job description
The Senior Semantic provides the technical and operational capability that supports the enterprise semantic and ontology function.
The Senior Semantic provides the technical and operational capability that supports the enterprise semantic and ontology function. Working closely with the Ontology Manager, the role is responsible for discovering, analysing, transforming, validating and publishing semantic assets derived from enterprise data, metadata, reference data and external information sources. The role supports the development and maintenance of ontologies, taxonomies, controlled vocabularies, business glossaries and knowledge graph assets. The role acts as the bridge between enterprise data sources, metadata platforms and semantic assets, applying semantic technologies, data analysis, automation and modern AI-assisted techniques to support the delivery of governed, reusable and business-aligned semantic assets. The role is responsible for the preparation, transformation, validation and publication of semantic assets but does not own enterprise application development, infrastructure management, platform administration, enterprise integration services or production data engineering.
- Query and analyse enterprise databases to profile source systems, inspect schema structures and identify candidate business concepts, classifications and reference data.
- Work with business and technical stakeholders to understand the meaning, usage and context of source data assets.
- Identify semantic modelling opportunities within operational and analytical data sources.
- Analyse structured, semi-structured and unstructured information sources to identify candidate concepts, relationships and classifications.
- Utilise AI-assisted tooling, natural language processing techniques and analytical approaches to accelerate concept discovery and semantic enrichment activities.
- Support the identification of semantic duplication, inconsistencies and data quality issues requiring governance review.
- Cleanse, standardise and reconcile terminology, hierarchies, classifications and reference data from multiple sources.
- Transform legacy vocabularies, spreadsheets and business classifications into reusable semantic assets.
- Maintain supporting datasets used in ontology, taxonomy and glossary development activities.
- Develop and maintain RDF, SKOS, OWL, Turtle and JSON-LD representations of approved semantic models.
- Create mappings between business concepts, source data and semantic representations.
- Support ontology, taxonomy and controlled vocabulary publication processes.
- Develop, test and optimise SPARQL queries to support semantic analysis, validation, reporting and knowledge graph operations.
- Support concept scheme maintenance and semantic asset lifecycle activities within enterprise graph platforms.
- Assist with semantic publication and synchronisation activities across approved platforms.
- Implement and maintain URI minting standards and identifier management practices.
- Support synonym management, concept reconciliation and entity matching activities.
- Establish and maintain mappings between internal semantic assets and relevant external standards, classifications and reference datasets.
- Develop and maintain SHACL validation rules and semantic quality controls.
- Execute semantic testing, compliance reviews and impact assessments.
- Monitor semantic assets for adherence to modelling standards, governance requirements and quality expectations.
- Support the publication and synchronisation of semantic assets within metadata, glossary and governance platforms.
- Maintain links between semantic assets, business glossaries and metadata catalogues.
- Contribute to semantic lineage, classification and metadata management activities.
- Maintain ontology and semantic asset repositories using Git and GitHub.
- Support Ontology CI/CD processes, including automated validation, testing, release packaging and version management.
- Contribute to semantic asset release, publication and change management activities.
- Collaborate with domain experts, business analysts, architects and engineering teams to clarify business terminology, definitions and classifications.
- Support semantic modelling workshops and knowledge discovery activities.
- Contribute to semantic standards, documentation and best practices.
- Experience working with ontologies, taxonomies, controlled vocabularies, metadata or knowledge graph solutions.
- Strong understanding of RDF, RDFS, SKOS, OWL, SHACL and Linked Data principles.
- Experience writing and optimising SQL and SPARQL queries.
- Experience using Python for data wrangling, transformation, automation and semantic processing.
- Experience with semantic libraries and frameworks such as RDFLib or similar technologies.
- Strong data analysis, profiling and data quality management skills.
- Experience cleansing, reconciling and transforming complex business datasets.
- Experience working with Git, GitHub and version-controlled asset management.
- Understanding of URI design, namespaces, semantic identifiers and reference data management.
- Strong analytical, problem-solving and investigative capabilities.
- Ability to communicate effectively with both business and technical stakeholders.
- Experience with Graphologi, PoolParty, TopBraid EDG, Semaphore or similar semantic management platforms.
- Experience with OpenMetadata, DataHub, Apache Atlas or related metadata platforms.
- Familiarity with SHACL validation frameworks and ontology quality assurance approaches.
- Experience supporting ontology publication and semantic asset lifecycle management.
- Familiarity with GitHub Actions or similar CI/CD tooling for semantic asset validation and release processes.
- Experience using AI-assisted tooling for semantic discovery, entity extraction and knowledge enrichment.
- Understanding of knowledge graph architecture and graph database technologies.
- Experience mapping internal semantic assets to external standards, taxonomies or industry reference data.
- Enjoys exploring complex and often undocumented data sources, uncovering meaning and transforming fragmented information into structured, governed knowledge assets.
- Pragmatic Builder
- Focuses on delivering practical, maintainable and reusable semantic solutions, balancing technical quality with business value.
- Semantic Quality Mindset
- Takes pride in accuracy, consistency and governance, ensuring semantic assets meet agreed standards and remain fit for enterprise use.
- Collaborative Communicator
- Works effectively with both technical and non-technical stakeholders, translating complex data structures and semantic concepts into clear business language.
- Continuous Learner
- Keeps abreast of developments in semantic technologies, metadata management, AI-assisted tooling and knowledge graph practices, applying new approaches where appropriate.
Our rapidly growing, award-winning business offers a dynamic environment for talented, entrepreneurial professionals to achieve results and grow their careers. Argus recognizes and rewards successful performance and as an Investor in People, we promote professional development and retain a high-performing team committed to building our success.
- Competitive salary and company bonus scheme
- Group pension scheme
- Group healthcare and life assurance scheme
- Hybrid working environment (currently two days in office)
- 25 days annual holiday with incremental increase up to 30 days
- Subsidised gym membership
- Season ticket travel loan
- Cycle to work scheme
- Flexible benefits platform (ability to buy additional medical cover, life assurance, dental cover, holiday, critical illness, travel insurance & health screening)
- Extensive internal and external training
Argus is the leading independent provider of market intelligence to the global energy and commodity markets. We offer essential price assessments, news, analytics, consulting services, data science tools and industry conferences to illuminate complex and opaque commodity markets.
Headquartered in London with 1,500 staff, Argus is an independent media organisation with 32 offices in the world’s principal commodity trading hubs.
Companies, trading firms and governments in 160 countries around the world trust Argus data to make decisions, analyse situations, manage risk, facilitate trading and for long-term planning. Argus prices are used as trusted benchmarks around the world for pricing transportation, commodities and energy.
Founded in 1970, Argus remains a privately held UK-registered company owned by employee shareholders and global growth equity firm General Atlantic.
'/%3e%3cpath%20d='M101.744%2012.4726L102.894%2016.1947L99.0021%2013.2201L101.744%2012.4726ZM105.3%208.40937H100.488L99.0026%203.59473L97.5116%208.41047L92.7%208.40385L96.5965%2011.3834L95.1055%2016.1942L99.0021%2013.2196L101.408%2011.3834L105.3%208.40992V8.40937Z'%20fill='white'/%3e%3cdefs%3e%3clinearGradient%20id='paint0_linear_5593_1381'%20x1='90'%20y1='9.44471'%20x2='99'%20y2='9.44471'%20gradientUnits='userSpaceOnUse'%3e%3cstop%20stop-color='%2300AD70'/%3e%3cstop%20offset='0.998594'%20stop-color='%2300B67A'/%3e%3cstop%20offset='1'%20stop-color='%23DCDCE6'/%3e%3c/linearGradient%3e%3c/defs%3e%3c/svg%3e){kind=small}
