Top 24 Ontologist Jobs

Ontologist
SOSi —Remote
- $137,004 - $284,548 a year
- Full-time
- Remote
- Computer Science
- 11+ years
- Java
Quick Apply
Ontologist
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $100,000 - $245,000 a year
- Full-time
- Computer Science
- Mid-level
- Analysis skills
- Disability insurance
- Health insurance
Ontologist (TS/SCI cleared)
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $100,000 - $245,000 a year
- Full-time
- Computer Science
- Mid-level
- Analysis skills
- Disability insurance
- Health insurance
Senior Ontologist
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $100,000 - $245,000 a year
- Full-time
- Computer Science
- Master's degree
- Analysis skills
- Disability insurance
- Health insurance
Senior Ontologist (TS/SCI cleared)
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $105,000 - $290,000 a year
- Full-time
- Computer Science
- Master's degree
- Analysis skills
- Disability insurance
- Health insurance
Ontologist - SOUTHCOM EDA
Celestar Corporation —Remote
- Full-time
- Computer Science
- 11+ years
- Java
- Paid holidays
- Disability insurance
Ontologist
Prescient Edge Federal —Doral, FL
- Full-time
- Computer Science
- 11+ years
- Office
- Health insurance
- Dental insurance
Ontologist
Quiet Professionals LLC —Tampa, FL
- Full-time
- Computer Science
- 11+ years
- Java
Quick Apply
Business Analyst - Ontologist
High5 —Alpharetta, GA
- $30 - $38 an hour
- Temporary
- Computer Science
- Mid-level
- Office
Knowledge Graph Engineer / Ontologist
The Hartford —New York, NY
- $156,000 - $234,000 a year
- Full-time
- Remote
- Computer science
- Computer Science
- Office
2026 Graduate – Software Engineer; Data Scientist; Ontologist – Threat Analytic Systems
Johns Hopkins Applied Physics Laboratory (APL) —Laurel, MD
- $85,000 - $165,000 a year
- Full-time
- Computer science
- Computer Science
- Analysis skills
- Disability insurance
- Health insurance
14d
Ontologist - Sr
Nalley Consulting —Doral, FL
- Full-time
- Computer Science
- 11+ years
- Office
- Paid parental leave
- Paid holidays
Project Manager (Ontologist)
Streamline Defense —Miami, FL
- Full-time
- Computer Science
- DevOps
- 11+ years
Quick Apply
Lead Ontologist - OBIQUA
Celestar Corporation —Reston, VA
- Full-time
- 5 years
- Master's degree
- Bachelor's degree
- Paid holidays
- Disability insurance
Ontologist/Data Scientist
Red Arch Solutions —Reston, VA
- $195,000 - $210,000 a year
- Email
- Computer science
- Computer Science
- Bachelor of Science
- Profit sharing
- Paid holidays
9d
Vice President- Ontologist
JPMorganChase —Brooklyn, NY
- $142,500 - $210,000 a year
- Full-time
- Computer science
- 3 years
- Doctor of Philosophy
- Health insurance
- Tuition reimbursement
1d

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Ontologist

SOSi -
Remote

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Job Details

Full-time
$137,004 - $284,548 a year

Qualifications

Ontology
Data model design
DevSecOps Practices
Mapping using GIS
Continuous Delivery (CD) implementation
Data modeling projects
OWL
Java
Bash
Application development
Version control systems
Semantic Web
Linked data
GIS software
DevOps automation
Query management
Python

Full Job Description

Company Description

Founded in 1989, SOSi is among the largest private, founder-owned technology and services integrators in the defense and government services industry. We deliver tailored solutions, tested leadership, and trusted results to enable national security missions worldwide.

Job Description

*** This position is contingent upon contract award ***

SOSi is seeking an Ontologist to support mission requirements for a structured approach to further develop, integrate, and sustain a scalable, federated data ecosystem that enhances interoperability, governance, and mission-driven analytics for a DoD customer. The primary objective of the program is to bridge the operational gaps between DoD, IC, interagency, and non-traditional international partners to enable real-time information sharing, dynamic data integration, and mission-tailored analytical capabilities.

Essential Job Duties:

Develop, refine, and maintain domain-specific ontologies to support structured data integration, semantic search, and AI-assisted decision support.
Enforce adherence to W3C standards and metadata alignment between Databricks Unity Catalog, GIS metadata systems, and operational data stores.
Collaborate with data scientists and analysts to ensure ontology-driven tagging and entity resolution enhances the relevance of research outputs.
Submit the Ontology Governance & Standardization Report, detailing ontology updates, integrations, and compliance with metadata standards.

Qualifications

Master’s degree or higher (e.g., Ph.D.) in Computer Science, Information Science, Artificial Intelligence, Geospatial Science, GIS, Data Science, Business Analytics, Cognitive Science, or a closely related field; OR a minimum of 11+ years of experience in ontology development, semantic technologies.
Possess the knowledge and capability to develop ontologies:
- Proficiency in writing advanced SPARQL queries.
- Strong skills in the W3C Web Ontology Language (OWL).
- Solid understanding of Basic Formal Ontology (BFO) and Common Core Ontologies (CCO).
- Proficiency in both Java and Python for ontology-driven application development
- Experience with Bash scripting for automation tasks.
Hands-on experience with ESRI data tools, including ArcGIS.
Background in DevSecOps practices, version control systems (e.g., Git) and CI/CD pipelines.
Strong analytical skills, attention to detail, and the ability to work collaboratively.
Demonstrated expertise in ontology design, semantic data modeling, and SPARQL query development, with proficiency in W3C standards (RDF, OWL, SHACL) and supporting frameworks like Basic Formal Ontology (BFO) and Common Core Ontologies (CCO).

Additional Information

Working Conditions

Remote. Offsite.

Working at SOSi

All interested individuals will receive consideration and will not be discriminated against for any reason.

Quick Apply

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Ontologist

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Knowledge Graph Engineer / Ontologist

2026 Graduate – Software Engineer; Data Scientist; Ontologist – Threat Analytic Systems

Ontologist - Sr

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Lead Ontologist - OBIQUA

Ontologist/Data Scientist

Vice President- Ontologist

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