Ontology Engineer (TS/SCI with CI Poly)

Job overview

The Ontology Engineer (TS/SCI with CI Poly) is an onsite role based in Herndon, VA. Compensation is specified as $137,000 - $182,000 per year, and this position supports the engineering team at Vantor, a company focused on spatial intelligence. This role exists to design, develop, and maintain domain-specific ontologies and knowledge models in support of Object-Based Intelligence (OBI) mission requirements. The Ontology Engineer applies semantic technologies to enable data interoperability and advanced analytics.

What you'll do

• Design and maintain ontologies and knowledge graphs, apply Semantic Web standards (RDF, OWL, SPARQL), establish data integration frameworks, and support AI/ML initiatives.

What we're looking for

Skills & competencies

full-time

day shift

herndon va

ontology engineer

knowledge graphs

semantic web

rdf

owl

sparql

security clearance

vantor

$137k-$182k/yr

Work arrangement

• Weekend coverage required

Benefits & perks

• 401(k) with match, mental health resources, student loan repayment, adoption reimbursement, and pet insurance.

Why this role

TS/SCI with CI Polygraph required

About the employer

Vantor is hiring for this role. Industry: Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology). Sector: 54.