Lead Semantic Data Modeler: Knowledge Graphs & AI

TalentOla; Chicago (IL); On-site; USD 110,000 - 170,000; Full time

Job summary

TalentOla is seeking a Semantic Data Modeler to design, develop, and manage semantic data models, ontologies, taxonomies, and knowledge graph solutions to support healthcare data intelligence using graph databases, AI, and cloud platforms.

You will lead complex semantic modeling initiatives, collaborate with senior engineers to standardize tooling and patterns, and mentor junior team members while driving robust, scalable data solutions.

Qualifications

• 5+ years of hands-on experience in semantic data modeling or knowledge graph engineering, including leading complex projects.
• Proven experience with graph databases or triple stores such as Amazon Neptune, Neo4j, Virtuoso, or GraphDB.
• Practical experience with RDF, OWL, SPARQL, and ideally SHACL.
• Experience with relational databases (SQL) and graph databases (SPARQL).
• Hands-on experience with ontology/graph tools such as Protégé, TopBraid, or Metaphactory.
• Solid understanding of data modeling, ETL processes, and data governance.
• Experience evaluating, creating, and managing taxonomies and ontologies.

Responsibilities

• Serve as a subject matter expert in semantic data modeling on the graph data team, contributing to initiatives that integrate AI, LLMs, and advanced graph technologies.
• Collaborate with senior engineers and architects to standardize tooling, design patterns, semantic models, and modeling approaches.
• Help define the technical direction for core semantic modeling capabilities, ensuring scalable and robust solutions.
• Independently research, evaluate, and propose innovative solutions to complex and ambiguous data modeling challenges.
• Build and manage scalable knowledge graph solutions, including data ingestion, linking, and querying mechanisms.
• Write, test, and document clean, maintainable code, and apply automation to testing, integration, and deployment processes.
• Partner with product owners to refine features into actionable user stories that deliver business value.
• Evaluate and recommend external taxonomies and ontologies; author new ones as needed to support the domain.
• Recommend and implement semantic modeling tools, platforms, and technologies.
• Support ontology governance processes and enterprise graph management tools.
• Collaborate with stakeholders, including data scientists, engineers, and business teams, to understand requirements and build effective semantic solutions.
• Provide technical mentorship to junior team members on semantic data modeling principles and implementation patterns.

Skills

Semantic data modeling

Knowledge graph engineering

Graph databases

RDF/OWL/SPARQL/SHACL

SQL & SPARQL

Ontology/tools Protégé/TopBraid/Metaph

Data modeling & ETL

Taxonomies & ontologies

Education

BE/ME/BTech/MTech/BSc/MSc

Tools

AWS Neptune

Metaphactory

Job description

TalentOla is seeking a Semantic Data Modeler to design, develop, and manage semantic data models, ontologies, taxonomies, and knowledge graph solutions to support healthcare data intelligence using graph databases, AI, and cloud platforms.

You will lead complex semantic modeling initiatives, collaborate with senior engineers to standardize tooling and patterns, and mentor junior team members while driving robust, scalable data solutions.