Ontology - Knowledge Graph Specialist

Pyramid Consulting, Inc; Southlake (TX); À distance; USD 96 000 - 110 000; Temps partiel

Résumé du poste

Pyramid Consulting, Inc. seeks an Ontology - Knowledge Graph Specialist for a 6+ month contract in Southlake, Texas with remote work options. The role focuses on designing enterprise ontologies, SPARQL queries, data modeling across multiple sources, and integrating knowledge graphs with AI agents.

Ideal candidates will have hands-on RDF/OWL/SHACL experience, graph DBs like GraphDB or Stardog, and Python-based ontology pipelines. Salary aligns with market rates for contract roles in the US.

Qualifications

• Hands-on RDF/RDFS/OWL/TTL/SHACL, SPARQL, and semantic Web tech experience.
• Knowledge graph design including class/property hierarchies and ontologies.
• Experience with schema-first and schema-late ontology development.

Responsabilités

• Design and evolve enterprise ontologies using RDF, RDFS, OWL, Turtle (TTL), and SHACL.
• Develop class/property hierarchies, relationships, taxonomies, namespaces, constraints, and reusable ontology patterns.
• Apply both schema-first and schema-late modeling approaches, including reverse-engineering models from existing data.
• Profile and model large, complex datasets from Excel/CSV, CIQ, configuration, inventory/CMDB, JSON, and relational sources.
• Define atomic vs. derived attributes, cross-field relationships, deterministic derivation rules, and validation rules.
• Develop SPARQL 1.1 queries, competency questions, graph traversals, dependency/impact queries, and semantic validation.
• Build and maintain ontology ingestion, transformation, validation, and testing pipelines using Python.
• Work with RDF graph databases such as GraphDB/Stardog and understand LPG technologies such as Neo4j.
• Support Ontology-RAG / GraphRAG / hybrid graph + vector retrieval and integration of knowledge graphs with AI agents.
• Partner with network/domain SMEs to translate implicit business and engineering knowledge into explicit, testable models.
• Maintain ontology artifacts, specifications, mappings, and validation rules in Git/CI-CD.

Connaissances

RDF

RDFS

OWL

TTL

SHACL

SPARQL

Knowledge graphs

Graph databases

LPG

Neo4j

Graph validation

Python

JSON Schema

Relational data modeling

Outils

GraphDB

Stardog

Neo4j

Description du poste

Immediate need for a talented Ontology - Knowledge Graph Specialist. This is a 06+ Months Contract opportunity with long-term potential and is located in Southlake, Texas (Remote).

Job ID:26-31159

Pay Range: $70 - $80/hour. Employee benefits include, but are not limited to, health insurance (medical, dental, vision), 401(k) plan, and paid sick leave (depending on work location).

Key Responsibilities:

• Design and evolve enterprise ontologies using RDF, RDFS, OWL, Turtle (TTL), and SHACL.
• Develop class/property hierarchies, relationships, taxonomies, namespaces, constraints, and reusable ontology patterns.
• Apply both schema-first and schema-late modeling approaches, including reverse-engineering models from existing data.
• Profile and model large, complex datasets from Excel/CSV, CIQ, configuration, inventory/CMDB, JSON, and relational sources.
• Define atomic vs. derived attributes, cross-field relationships, deterministic derivation rules, and validation rules.
• Develop SPARQL 1.1 queries, competency questions, graph traversals, dependency/impact queries, and semantic validation.
• Build and maintain ontology ingestion, transformation, validation, and testing pipelines using Python.
• Work with RDF graph databases such as GraphDB/Stardog and understand Labeled Property Graph (LPG) technologies such as Neo4j.
• Support Ontology-RAG / GraphRAG / hybrid graph + vector retrieval and integration of knowledge graphs with AI agents.
• Partner with network/domain SMEs to translate implicit business and engineering knowledge into explicit, testable models.
• Maintain ontology artifacts, specifications, mappings, and validation rules in Git/CI-CD.

Key Requirements and Technology Experience:

• Strong hands-on experience with RDF, RDFS, OWL, TTL, SHACL, SPARQL, and Semantic Web technologies.
• Practical knowledge of knowledge graphs, graph traversal, RDF stores, LPGs, and graph validation.
• Experience with schema-first and schema-late ontology development.
• Strong data modeling and reverse-engineering skills, including working with messy or incomplete source data.
• Experience with JSON Schema, relational data modeling, and mapping between relational/JSON and graph model

Our client is a leading IT Industry, and we are currently interviewing to fill this and other similar contract positions.

Pyramid Consulting, Inc. provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.