2mo
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Ontology Architect
United States
$150k-$220k/yr RemoteFull Time
5+ YOE5+ years in ontology development and data architecture for AI/ML; knowledge graph tech; Python; ontological modeling; production ML/graph pipelines.
RDF, OWL, SPARQL, Neo4j, TigerGraph, Python, spaCy, Hugging Face, Scikit-learn, PyTorch, TensorFlow
1mo
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Ontology Systems Engineer
United States
$157k-$175k/yr RemoteFull Time
8+ YOEBachelor's in Systems Engineering or related field with 8+ yrs experience; or Master's with 6+ yrs; experience designing enterprise data architectures and ontologies; DoD Secret clearance required.
Knowledge Graph, Ontology, Semantic Web, Palantir Foundry, Snowflake
2w
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Ontology Consultant
United States or Arlington
$110k-$150k/yr HybridFull Time
2+ YOE2+ years developing and managing ontologies; expertise in RDF, OWL, SHACL, SPARQL; hands-on Protégé experience; bachelor's degree or higher in related field; strong communication and facilitation skills.
RDF, OWL, SHACL, SPARQL, Protégé
2w
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Ontology Engineer
Huntsville, Alabama, United States
OnsiteFull Time
10+ YOE10+ years in systems engineering/knowledge representation with ontology development experience; active U.S. citizenship and DoD Secret clearance; proficiency with OWL/RDFS, SPARQL/SHACL, graph stores, Protégé, MBSE tool alignment, and Python.
OWL, RDFS, SHACL, SPARQL, Gremlin, Cypher, Protégé, GraphDB, Stardog, Apache Jena Fuseki, Neo4j, JanusGraph, Python, Cameo, MagicDraw, SysML, Ontology Modeling Language (OML)
1w
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Palantir Enterprise Ontology Architect
Arlington, Virginia, United States
HybridFull Time
6+ YOEActive Secret clearance, bachelor's degree, 6+ years relevant experience (≥3 years hands-on in data modeling/ontology), Palantir Foundry ontology experience, metadata and API governance, familiarity with identity and access concepts.
Palantir Foundry, Palantir Ontology Manager, SQL
2w
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Ontology Expert - Remote
Dallas, Texas, United States
$106k-$147k/yr RemoteFull Time
5+ YOE5+ years in ontology/knowledge engineering with healthcare domain experience; proficiency with OWL, RDF, SPARQL, Protégé/TopBraid/Stardog, FHIR/HL7, and Python; strong collaboration and governance skills.
OWL, RDF, SPARQL, Protégé, TopBraid, Stardog, FHIR, HL7, SNOMED CT, ICD-10, LOINC, RxNorm, Python, LLM, RAG
2w
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Ontology Support Manager
United States
$150k-$200k/yr OnsiteFull Time
8+ YOE8+ years in data architecture/ontology/data modeling with 3+ years overseeing cross-functional data initiatives; experience with data pipelines, schemas, metadata, governance, strong communication skills.
Palantir Foundry
2d
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Palantir Foundry Ontology Engineer
San Diego, California, United States
$78k-$176k/yr OnsiteFull Time
3+ YOE3+ years in software/data/platform engineering, Palantir Foundry experience, ontology design, Python or TypeScript, stakeholder engagement, and ability to obtain a Secret clearance.
Palantir Foundry, Code Repositories, Pipeline Builder, Python, TypeScript, Git, CI/CD
2d
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Palantir Foundry Ontology Engineer
San Diego or McLean
$78k-$176k/yr OnsiteFull Time
3+ YOE3+ years in software/data/platform engineering, experience with Palantir Foundry, ontology design, Python or TypeScript, stakeholder engagement, and ability to obtain Secret clearance; bachelor\u0002s degree required.
Palantir Foundry, Python, TypeScript, Git
3w
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Ontology Engineer (TS/SCI)
Herndon, Virginia, United States
$137k-$200k/yr OnsiteFull Time
12+ YOEU.S. citizen with active TS/SCI + CI poly; 12+ years with an advanced degree or 17+ years with a bachelor's; experience designing ontologies/knowledge graphs and using RDF, OWL, SHACL, and SPARQL.
RDF, OWL, SHACL, SPARQL
3w
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Ontology Engineer (TS/SCI)
Herndon, Virginia, United States
$137k-$200k/yr OnsiteFull Time
12+ YOEU.S. citizen with active TS/SCI+CI polygraph, 12+ years experience with advanced degree (or 17+ years with bachelor's); expertise designing ontologies/knowledge graphs and using RDF, OWL, SHACL, and SPARQL.
RDF, OWL, SHACL, SPARQL
3mo
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Manager, Ontology & Data Modeling
McLean or Richmond or Chicago or New York
$150k-$205k/yr OnsiteFull Time
4+ YOEBachelor's in information science, computer science, engineering, library science, ontology, semantics or computational linguistics; 4+ years in metadata/ontology/semantics; 4+ years with W3C standards and ontology tools; 4+ years with SQL/SPARQL.
Protégé, TopQuadrant, PoolParty, Stardog, AnzoGraph, Neptune, Data.World, SQL, SPARQL, RDF, RDFS, OWL, SKOS, SHACL, JSON, XML, OpenAPI, YAML, AVRO, Python, R, AWS
1mo
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Ontology Architect
United States or North America
RemoteFull Time
Expert-level mastery of semantic technologies, hands-on production experience with GraphDB/Stardog/Neptune/AllegroGraph/Neo4j, proficiency with Protégé/TopBraid Composer/PoolParty, Data Mesh design, and relational/dimensional modeling and ETL/ELT patterns.
GraphDB, Stardog, Amazon Neptune, AllegroGraph, Neo4j, Protégé, TopBraid Composer, PoolParty, Data Mesh, ETL/ELT, GNNs, Graph RAG
4w
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Ontology Engineer
Auburn Hills, Michigan, United States
OnsiteFull Time
8+ YOEBachelor's degree in business or technical field, 8+ years data engineering experience, strong SQL, data modeling and ETL/ELT skills, familiarity with Snowflake/Palantir/Databricks, Git; Python/TypeScript and Power BI experience preferred.
SQL, Python, PySpark, TypeScript, Snowflake, Palantir Foundry, Databricks, Microsoft Power BI, Git
3mo
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Ontology Expert - Remote (Dallas, TX, US)
Dallas, Texas, United States
RemoteFull Time
5+ YOE5+ years in ontology engineering/semantic modeling; healthcare domain knowledge; experience with structured/unstructured healthcare data; collaboration across clinical and technical teams.
OWL, RDF, SPARQL, Knowledge Graph, Protégé, TopBraid, Stardog, FHIR, HL7, healthcare data models, Python
3mo
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Principal Enterprise Ontology Architect / Engineer
Los Angeles, California, United States
$225k-$260k/yr HybridFull Time
Bachelor’s degree in Computer Science, Data Science, Information Systems; deep expertise in ontologies, knowledge graphs, and semantic modeling; hands-on experience with FIBO and financial domain modeling; experience with Snowflake, Azure SQL, and Microsoft Fabric; able to lead ontology lifecycle and agentic systems; strong stakeholder collaboratio...
Snowflake, Azure SQL, Microsoft Fabric, Fabric IQ, Neo4j, AWS Neptune, SPARQL, OWL, RDF, SHACL
1mo
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Lead Data and Ontology Engineer
Lake Buena Vista, Florida, United States
$148k-$199k/yr HybridFull Time
7+ YOE7+ years in data engineering/architecture or semantic technologies; deep ontology modeling (OWL, RDF, SKOS, SHACL); graph and vector DB experience; Python, SPARQL, Cypher, GraphQL, SQL; AWS and federated data platform experience; Bachelor's required.
OWL, RDF, SKOS, SHACL, Neo4j, Amazon Neptune, Qdrant, Protégé, TopBraid, Stardog, Python, SPARQL, Cypher, GraphQL, SQL, Snowflake, Databricks, PostgreSQL, MongoDB, S3, Kafka, AWS, Apache Iceberg, Trino, Presto
1w
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Principal Data and Ontology Architect - AI Enablement (11476)
Marysville, Ohio, United States
HybridFull Time
10+ YOEBachelor's degree, 10+ years in data architecture/governance/ontology or related fields; expertise in semantic modeling and ontology design; ability to translate between business and IT and enable data stewards.
OWL (Web Ontology Language), RDF, RDFS, Neo4j, Amazon Neptune, Palantir Ontology, SPARQL
3w
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Senior Ontology Expert/Project Manager
Doral, Florida, United States
$102k-$199k/yr OnsiteFull Time
11+ YOEActive TS/SCI clearance; Master’s or PhD (or 11+ years experience); PMP/CSM/CSEP preferred; expertise in ontology development, SysEngOps, DevSecOps, version control, CI/CD; skilled in Python, R, SQL/NoSQL, PostgreSQL, and ESRI (ArcGIS/ArcPy).
Python, R, SQL, NoSQL, PostgreSQL, ESRI, ArcGIS, ArcPy, SysEngOps, DevSecOps, version control systems, CI/CD pipelines
2mo
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Director, Data Ontology
New York, New York, United States
$180k-$200k/yr RemoteFull Time
7+ YOE7+ years in data roles; expertise in data modeling, knowledge management, semantic architecture; experience with knowledge graphs, SQL, data warehouses, and AI-ready data schemas; healthcare or life sciences data knowledge.
SQL, dbt, BigQuery, Knowledge graph, OpenRTB
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