Ontologist Jobs in Virginia (NOW HIRING)

Celestar Corporation is seeking a Lead Ontologist to support the Defense Intelligence Agency (DIA) under the Object Based Intelligence and Quality Assurance (OBIQUA) task order. The primary place of performance will be at DIA Facilities across the National Capital Region (NCR). If interested and meet the qualifications, we encourage you to apply for this rewarding and impactful opportunity.
ANTICIPATED AWARD: October 2026
ANTICIPATED START: October 2026
PERIOD OF PERFORMANCE: 1 Base Year + 4 Option Years
LOCATION: DIA Facilities across the National Capital Region (NCR)
CLEARANCE REQUIREMENT: Active TS/SCI with a Current CI Poly (adjudicated within the last 5 years)
About Us:
Celestar, a B&A Company, offers highly competitive salaries and benefits. Our comprehensive benefits package includes company-paid employee and family dental insurance, employee health insurance, life insurance, and disability coverage. Additionally, we provide a 401(k)-retirement plan with company matching, paid holidays, and personal time off.
Responsibilities:
This opportunity supports DIA's Object Based Intelligence and Quality Assurance (OBIQUA) initiative focused on advancing intelligence analysis through Agile program management, AI assurance, analytic innovation, and ontology development.
• The Lead Ontologist is responsible for the development of domain-specific ontologies.
• This position leads the application of semantic web standards (e.g., RDF, OWL, SPARQL) and government data standards to enable semantic representation of data inputs, facilitating integration and interoperability across intelligence systems.
• Design, develop, and maintain domain-specific ontologies supporting intelligence and data integration initiatives.
• Apply semantic web technologies and standards, including RDF, OWL, SPARQL, and related ontology engineering methodologies.
• Develop semantic data models and knowledge representation frameworks to support interoperability across intelligence systems.
• Collaborate with data architects, AI engineers, analysts, and Government stakeholders to ensure alignment with mission requirements.
• Support data integration, discovery, and knowledge management efforts through ontology-driven solutions.
• Provide technical leadership and guidance on ontology development, semantic technologies, and emerging industry best practices.
Required Qualifications:
• Demonstrated senior-level expertise in developing and implementing ontologies for complex data systems.
• Experience with semantic web technologies and standards including RDF, OWL, SPARQL, SHACL, or related ontology engineering tools.
• Desired Experience: Minimum 12 years of experience related to the specific labor category with at least a portion of the experience within the last 2 years.
• Desired Education: Master's degree in an area related to the labor category from a college or university accredited by an agency recognized by the U.S. Department of Education; or have Bachelor's degree related to the labor category from a college or university accredited by an agency recognized by the U.S. Department of Education and an additional 5 years of related senior experience, for a total of 17 years, as a substitute to the Master's degree
Come on board with a company that Values its Employees!
Celestar Corporation is an Equal Opportunity Employer. The Celestar Corporation prohibits discrimination, harassment, and retaliation in employment based on race; color; religion; genetic information; national origin; sex (including same-sex); sexual orientation; gender identity; pregnancy, childbirth, or related medical conditions; age; disability or handicap; citizenship status; marital status; service member/protected veteran status; or any other category protected by federal, state, or local law.