Ontology Expert

Ontology Expert - 26-00755
100% Remote
9 Months Duration
Temp W2 or C2C

NTT DATA strives to hire exceptional, innovative and passionate individuals who want to grow with us. If you want to be part of an inclusive, adaptable, and forward-thinking organization, apply now.
NTT DATA's Client is currently seeking an Ontology Expert to join their team.

Ontology Expert – Healthcare AI Solutions
Day to Day job Duties:
Role Summary
We are seeking an experienced Ontology Expert to design, develop, and govern healthcare ontologies that power AI-driven and agentic healthcare solutions. The role focuses on building semantic models that enable interoperability, reasoning, knowledge representation, and explainable AI across clinical and healthcare enterprise systems.
Key Responsibilities

• - Design, build, and maintain healthcare ontologies and semantic models.
• - Define domain vocabularies, taxonomies, and relationships for AI-driven solutions.
• - Support knowledge representation for AI agents, decision-support, and clinical intelligence systems.
• - Collaborate with clinicians, data scientists, and AI engineers to translate knowledge into formal models.
• - Govern ontology lifecycle, versioning, and semantic consistency.

Healthcare Ontology & Semantic Modeling

• - Develop ontologies using standards such as OWL, RDF, and SKOS.
• - Work with healthcare standards and terminologies (SNOMED CT, ICD-10, LOINC, RxNorm).
• - Enable semantic interoperability across EHRs and healthcare data sources.
• - Support reasoning, inference, and rule-based logic for AI systems.

AI & Agentic Solution Support

• - Enable AI and GenAI systems with structured healthcare knowledge.
• - Support agentic workflows, decision models, and explainable AI outputs.
• - Collaborate on RAG pipelines and knowledge graph integration for LLM-based systems.
• - Ensure semantic accuracy and safety for clinical use cases.

Technical Skills & Tools

• - Strong knowledge of OWL, RDF, SPARQL, and knowledge graph technologies.
• - Experience with ontology tools such as Protégé, TopBraid, or Stardog.
• - Familiarity with FHIR, HL7, and healthcare data models.
• - Exposure to AI/ML and GenAI systems, including LLM-enabled solutions.
• - Programming or scripting experience in Python or similar languages (preferred).

Compliance, Governance & Quality

• - Ensure ontologies align with clinical safety, regulatory, and compliance requirements.
• - Support auditability, traceability, and explainability of AI decisions.
• - Define semantic governance policies and best practices.

Basic Qualifications: (what are the skills required to this job with minimum years of experience on each)
Required Skills & Experience

• - 5+ years of experience in ontology engineering, semantic modeling, or knowledge engineering.
• - Strong healthcare domain knowledge (clinical, payer, or life sciences).
• - Experience working with structured and unstructured healthcare data.
• - Ability to collaborate across technical and clinical teams.

Nice to Have;
Preferred Qualifications

• - Background in clinical informatics or biomedical informatics.
• - Experience with healthcare AI platforms or decision-support systems.
• - Knowledge of semantic search, reasoning engines, or knowledge graphs.
• - Advanced degree in Computer Science, Biomedical Informatics, or related fields.

Soft Skills

• - Strong analytical and conceptual thinking abilities.
• - Excellent communication skills to work with clinical and technical stakeholders.
• - Attention to detail and passion for semantic accuracy.

#LI
About NTT DATA:

NTT DATA is a $30 billion trusted global innovator of business and technology services. We serve 75% of the Fortune Global 100 and are committed to helping clients innovate, optimize and transform for long term success. As a Global Top Employer, we have diverse experts in more than 50 countries and a robust partner ecosystem of established and start-up companies. Our services include business and technology consulting, data and artificial intelligence, industry solutions, as well as the development, implementation and management of applications, infrastructure and connectivity. We are one of the leading providers of digital and AI infrastructure in the world. NTT DATA is a part of NTT Group, which invests over $3.6 billion each year in R&D to help organizations and society move confidently and sustainably into the digital future. Visit us at us.nttdata.com

Where required by law, NTT DATA provides a reasonable range of compensation for specific roles. The starting hourly range for this remote role is $95 to $105.  This range reflects the minimum and maximum target compensation for the position across all US locations. Actual compensation will depend on several factors, including the candidate's actual work location, relevant experience, technical skills, and other qualifications. This position may also be eligible for incentive compensation based on individual and/or company performance.
This position is eligible for company benefits that will depend on the nature of the role offered. Company benefits may include medical, dental, and vision insurance, flexible spending or health savings account, life, and AD&D insurance, short-and long-term disability coverage, paid time off, employee assistance, participation in a 401k program with company match, and additional voluntary or legally required benefits.

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