Ontology / Knowledge Graph Engineer

2T Consulting; Bedminster Township (NJ); On-site; USD 87,000 - 171,000; Full time

Benefits offered by this job

Vacation 120 hours

Sick time 40 hours

Holiday pay

Parental leave

Bereavement leave

Volunteer leave

Long-term incentive program

Job summary

2T Consulting is seeking an Ontology / Knowledge Graph Engineer to design and implement ontology-driven knowledge graphs. You will work on semantic modeling, establish governance, and collaborate with data teams to align ontologies with business needs.

The role requires hands-on experience with OWL, RDF, SPARQL, SHACL, and JSON-LD, plus proficiency in ontology inference and data consistency checks. Strong experience with Protégé and graph platforms is expected.

Qualifications

• Experience designing ontology-driven knowledge graphs using OWL, RDF, SPARQL, SHACL, and JSON-LD.
• Hands-on experience with ontology inference and consistency checking.

Responsibilities

• Design, develop, and maintain enterprise ontologies and semantic models.
• Build ontology-driven Knowledge Graph solutions aligned with business and technical requirements.
• Develop and manage RDF-based knowledge graphs using OWL, RDF, SPARQL, SHACL, and JSON-LD.
• Implement ontological inference and reasoning capabilities.
• Perform consistency checking and validation of ontologies and knowledge graph data.
• Develop graph data models supporting RDF and property graph architectures.
• Implement entity resolution and semantic relationships across data sources.
• Perform graph analytics to derive insights from connected data.
• Use Protégé, TopBraid Composer, Stardog, GraphDB, Neo4j, and Apache Jena.
• Collaborate with data engineers, architects, and stakeholders to define semantic requirements and standards.
• Establish ontology governance, versioning, validation, and KG quality practices.

Skills

Ontology engineering

Knowledge modeling

Semantic modeling

Ontology-driven KG design

Inference & reasoning

Knowledge graphs

Graph data modeling

Entity resolution

Scalable semantic solutions

Tools

Protégé

TopBraid Composer

OntoStudio

Neo4j

Stardog

GraphDB

Apache Jena

Fuseki

Blazegraph

Virtuoso

Job description

We are seeking an experienced Ontology / Knowledge Graph Engineer with strong expertise in ontology engineering, semantic modeling, and knowledge graph development. The ideal candidate will have hands‑on experience designing and implementing ontology‑driven knowledge graphs using standards such as OWL, RDF, SPARQL, SHACL, and JSON‑LD.

Required Skills

• Strong experience in Ontology Engineering and ontology‑driven knowledge graph design.
• Expertise in Knowledge Modeling and Semantic Modeling.
• Hands‑on experience with OWL, RDF, SPARQL, SHACL, and JSON‑LD.
• Experience with Ontological Inference and consistency checking.
• Strong knowledge of Knowledge Graphs, RDF Graphs, and Property Graphs.
• Experience with Graph Data Modeling and Graph Analytics.
• Hands‑on experience with Entity Resolution.
• Ability to design and implement scalable semantic and knowledge graph solutions.

Technologies / Tools

• Protégé
• TopBraid Composer
• OntoStudio
• Neo4j
• Stardog
• GraphDB
• Apache Jena
• Fuseki
• Blazegraph
• Virtuoso

Key Responsibilities

• Design, develop, and maintain enterprise ontologies and semantic models.
• Build ontology‑driven Knowledge Graph (KG) solutions aligned with business and technical requirements.
• Develop and manage RDF‑based knowledge graphs using OWL, RDF, SPARQL, SHACL, and JSON‑LD.
• Implement ontological inference and reasoning capabilities.
• Perform consistency checking and validation of ontologies and knowledge graph data.
• Develop graph data models and support both RDF and property graph architectures.
• Implement entity resolution and semantic relationships across disparate data sources.
• Perform graph analytics to derive insights from connected data.
• Use ontology and knowledge graph tools such as Protégé, TopBraid Composer, Stardog, GraphDB, Neo4j, and Apache Jena.
• Collaborate with data engineers, architects, and business stakeholders to define semantic requirements and modeling standards.
• Establish best practices for ontology governance, versioning, validation, and knowledge graph quality.

Location

Bedminster

Contract type

Full‑time, Permanent

Salary

$86,700 - $170,900

Benefits

• Pay range: $86,700 - $170,900
• Discretionary annual incentive program subject to rules governing the program.
• Employee eligibility for company's long‑term incentive program.
• Vacation – 120 hours per calendar year
• Sick time – 40 hours per calendar year (48 hours for employees in Colorado, 56 in Washington)
• Holiday pay, including floating holidays – 13 days per calendar year
• Work, personal and family time – up to 40 hours per calendar year
• Parental leave – 480 hours within one year of birth/adoption/foster care
• Bereavement leave – 240 hours for immediate family, 40 hours for extended family per calendar year
• Caregiver leave – 80 hours in a 52‑week rolling period
• Volunteer leave – 32 hours per calendar year
• Military spouse time‑off – 80 hours per calendar year

Equal Opportunity Statement

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, protected veteran status, or any other legally protected basis, in accordance with applicable law.