Sr Data Ontologist

Role: Sr Data Ontologist

Location: Seattle, WA (Remote)

We are seeking an experienced Senior Data Ontologist to design, develop, and govern enterprise-level ontologies and semantic data models. The role focuses on standardizing data meaning, enabling knowledge graphs, and supporting AI/ML, analytics, and data-driven decision-making across the organization.

Key Responsibilities

• Design, develop, and maintain enterprise and domain-specific ontologies, taxonomies, and semantic data models.
• Define and manage entities, relationships, attributes, and hierarchies to ensure consistent data interpretation.
• Collaborate with business stakeholders, data architects, engineers, and data scientists to translate business concepts into formal ontologies.
• Support knowledge graph development, semantic search, and AI/ML use cases.
• Establish and enforce data standards, metadata models, and governance frameworks.
• Ensure data consistency, lineage, and interoperability across multiple systems and platforms.
• Review, validate, and optimize ontologies for performance, scalability, and reuse.
• Mentor junior data modelers or ontologists and provide thought leadership on semantic technologies.
• Document ontology designs, standards, and best practices.

Required Skills & Qualifications :

• Bachelor’s or Master’s degree in Computer Science, Data Science, Information Systems, or related field.
• 8+ years of experience in data modeling, semantic modeling, or ontology development.
• Strong hands-on experience with:
  • OWL, RDF, RDFS, SPARQL
  • Knowledge Graph concepts
• Proficiency in tools such as Protégé, Neo4j, Stardog, GraphDB, TopBraid, or similar.
• Solid understanding of metadata management, data governance, and master data concepts.
• Experience working with structured and unstructured data.
• Strong analytical, problem-solving, and communication skills.