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Ontology Specialist

Minnesota - Other

Hollstadt Overview

Hollstadt Consulting is a management and technology consulting firm dedicated to placing professionals at engagements where they will excel. When you work with us, you'll work with a refreshingly real company led and staffed by seasoned experts who are also down-to-earth, good people. We're committed to treating you with respect and helping you achieve your career aspirations.

Since 1990, Hollstadt has been a trusted partner to more than 150 domestic and global companies and has successfully completed over 3,000 projects. Our continued growth has created challenging and rewarding opportunities for accomplished IT and Business Consultants. Hollstadt Consulting is an equal opportunity employer including disability/veteran.

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Job Description

Role: Ontology Specialist Role

Contract: 1 year

Location: Remote

Rate: $70/hour W2


Summary:

Ontology specialist to design and maintain the knowledge representation that underpins healthcare administrative data. The role translates tacit domain knowledge into formal RDF/OWL structures, aligns with industry standards (FHIR, SNOMED, ICD), and informs how downstream AI and analytics systems reason over the data.


Core Responsibilities:

  • Design and maintain ontologies (RDF, OWL, SKOS) for the healthcare administrative domain.
  • Map and align internal models against FHIR, SNOMED, and ICD.
  • Query and validate the knowledge graph using SPARQL; iterate on representation patterns.
  • Codify tacit business knowledge into formal structures, in partnership with domain experts.
  • Explain tradeoffs between modeling approaches and recommend a direction.
  • Inform graph database design (Neo4j, TypeDB, or similar) and integration with AI systems.

Technical Requirements:

  • Bachelor's degree and 7+ years in data/knowledge engineering, with significant time in ontology or knowledge representation.
  • Hands-on with RDF, OWL, SKOS, or similar.
  • Proficiency with SPARQL for querying and manipulating RDF/OWL data.
  • Hands-on with an ontology authoring tool (Protégé or equivalent).
  • Working knowledge of ontology design patterns.
  • Familiarity with healthcare standards (FHIR, SNOMED, ICD) applied to administrative domains.
  • Graph database experience (Neo4j, TypeDB, or similar).
  • Python and exposure to NoSQL, SQL, and graph databases. • Familiarity with AI frameworks.

Other Requirements:

  • Pattern codification: Translates tacit business knowledge into formal structures.
  • Healthcare context: Understands clinical and administrative domain complexity.
  • Industry awareness: Tracks ontology and knowledge graph evolution; brings relevant insights back.
  • Experimentation: Tests modeling approaches before committing to architecture; explains tradeoffs from hands-on experience.
  • Exposure to reasoners (e.g., HermiT, Pellet, ELK), SHACL for shape/constraint validation, and terminology services (UMLS, terminology servers) is a plus.

Benefits + Perks

Comprehensive Benefit Plan

Hollstadt offers medical, dental, vision, life insurance, short-term disability, long-term disability, paid sick leave, and retirement benefits to eligible employees. With three different medical plans to choose from, you can enroll in the coverage you need from individual to family, or anywhere in between!

Remarketing Process

Hollstadt is based on retention and relationships. We get to know your strengths and career wishes throughout your assignment and then start remarket discussions 6-8 weeks prior to your end date. By being proactive, we are able to keep your down time between assignments as short as possible, unless you choose otherwise.

Professional Development

Hollstadt offers on-demand training through our consultant portal. Trainings give our consultants the continuing education they need to excel on their projects. Many of our courses apply towards continuing education credits and we have an entire training hub dedicated to upskilling in Artificial Intelligence (AI).

401k + Matching

One popular benefit is our 401(k) match on the first 4% of your contributions. Hollstadt wants to help you reach your long-term financial goals and understands that planning for your future is critical. Consultants also have access to support from a Financial Advisor.

Bonus Opportunities

We appreciate and reward loyalty. Join Hollstadt, stay for 5 years, and we’ll give you a $5,000 Longevity Award bonus! Additionally, we know great talent knows other great talent. If you are on contract with Hollstadt and refer one of your connections who gets placed, we’ll pay you $1,000!

Ongoing Support & Networking

We have made a significant investment in building a support program for our consultant team - so you never have to feel like you are going it alone. We also have a Consultant Coach program which acts like a 'work buddy' to provide a safe ear for questions or concerns at your client site.