Senior Ontology Engineer

Andersen is seeking a Senior Ontology Engineer to join a project focused on building a large-scale Knowledge Graph and delivering AI-powered data and identity solutions. You will work with a global technology provider to model complex relationships between audiences, content, brands, and behavioral data to help organizations make informed business decisions.

Key responsibilities

• Own the end-to-end design, development, and versioning of core RDF/RDFS/OWL ontologies and SHACL validation frameworks.
• Define ontology standards, derived-attribute schemas, and governance practices aligned with W3C and industry standards.
• Lead ontology design reviews and translate business requirements into scalable knowledge graphs and semantic data models.
• Co-design derivation and transformation pipelines with Data Engineering teams using Databricks and Spark.

Requirements

• Over 5 years of hands-on experience in ontology engineering, semantic data modeling, or knowledge graph development.
• Deep expertise in W3C semantic web standards including RDF, RDFS, OWL, SPARQL 1.1, and SHACL.
• Proven experience building and validating graph schemas in production triplestores such as Amazon Neptune, Stardog, or GraphDB.
• Strong proficiency in Python for building production-quality data pipelines and graph processing workflows.
• Practical understanding of entity resolution, record linkage, and the trade-offs between OWL expressivity and system scalability.

What we offer

• Opportunity to work on a large-scale, high-impact Knowledge Graph project.
• Collaborative environment focused on cutting-edge AI and data analytics solutions.
• Professional growth within a global technology organization.