Ontological Engineer - Enterprise Knowledge Graphs & AI

InterImage; Virginia; On-site; USD 130,000 - 173,000; Full time

Job summary

InterImage is seeking an Ontological Engineer to shape the knowledge foundations behind enterprise AI systems for government customers. You will define formal ontologies and standardized vocabularies to enable data and systems to share a common understanding.

You will build machine-readable models with OWL, RDF, SPARQL, and SHACL, create guardrails for knowledge graphs and LLM applications, and collaborate with enterprise data teams. U.S. citizenship and security clearance are a plus.

Qualifications

• Degree in computer science, information technology, cyber, mathematics, or a related field.
• Experience designing enterprise ontologies and controlled vocabularies, including upper ontology frameworks or domain ontologies.
• Experience building AI systems from scratch and shaping prototype applications.
• Proficiency with OWL, RDF, SPARQL and SHACL standards.
• Knowledge of knowledge graphs, Graph RAG and LLM applications.
• Experience collaborating with enterprise data or AI teams and translating ontology decisions for technical and non-technical stakeholders.
• U.S. citizenship and eligibility to work in the United States are required.
• Experience working with government customers is a plus.
• An active security clearance is a plus.

Responsibilities

• Define domain concepts, entities, categories, attributes, and relationships in formal ontologies.
• Standardize vocabularies to establish shared business or scientific meaning across systems and departments.
• Build and maintain machine-readable knowledge models using OWL, RDF, SPARQL, and SHACL.
• Provide structured context and guardrails for enterprise AI, knowledge graphs, Graph RAG, and LLM applications to improve reasoning, reduce hallucinations, and integrate heterogeneous data.

Skills

OWL

RDF

SPARQL

SHACL

Knowledge graphs

Graph RAG

LLM applications

Ontology design

Education

Degree in Computer Science or related field

Job description

InterImage is seeking an Ontological Engineer to shape the knowledge foundations behind enterprise AI systems for government customers. You will define formal ontologies and standardized vocabularies to enable data and systems to share a common understanding.

You will build machine-readable models with OWL, RDF, SPARQL, and SHACL, create guardrails for knowledge graphs and LLM applications, and collaborate with enterprise data teams. U.S. citizenship and security clearance are a plus.