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Semantic Web Jobs (NOW HIRING)

Maxar

Ontology Engineer (TS/SCI)

Herndon, VA · On-site

Leveraging Semantic Web standards, including RDF, OWL, and SPARQL, the LeadOntologistdevelops scalable knowledge frameworks that enhance data discoverability, support AI/ML applications, and ...

CELESTAR

Lead Ontologist - OBIQUA

Reston, VA · On-site

... 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 ...

TetraScience

Data & Semantic Model Architect

$65.25 - $84/hr

Deep, hands-on expertise with semantic web standards (RDF, OWL, SHACL, SPARQL) and property graph concepts (LPG). Requirements * 7+ years of experience in data architecture, informatics, or technical ...

The Talent Mine

Ontology Engineer

Dallas, TX

Stay current with advancements in knowledge representation, semantic web technologies, and AI/ML techniques. Minimum Requirements: * 3+ years of experience in ontology engineering, knowledge graph ...

Associated Bank - Corp

Knowledge Engineer

Omaha, NE · On-site

Enable advanced data discovery and analytics by applying semantic web standards, graph technologies, and knowledge modeling practices. * Support AI-ready data capabilities by designing semantic ...

Associatedbank

Knowledge Engineer

North East, PA

Enable advanced data discovery and analytics by applying semantic web standards, graph technologies, and knowledge modeling practices. * Support AI-ready data capabilities by designing semantic ...

The Talent Mine

Ontology Engineer

Dallas, TX

Stay current with advancements in knowledge representation, semantic web technologies, and AI/ML techniques. Minimum Requirements: * 3+ years of experience in ontology engineering, knowledge graph ...

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How much do semantic web jobs pay per hour?

As of Jul 14, 2026, the average hourly pay for semantic web in the United States is $59.01, according to ZipRecruiter salary data. Most workers in this role earn between $51.20 and $66.83 per hour, depending on experience, location, and employer.

What are the typical daily responsibilities of a Semantic Web professional?

A Semantic Web professional typically spends their day designing semantic data models, developing ontologies, and implementing standards like RDF and OWL to structure and link complex information. You may work closely with data scientists, software engineers, and subject matter experts to ensure data interoperability and support knowledge-driven applications. Tasks often include writing SPARQL queries, integrating heterogeneous data sources, and collaborating on system architecture or solution design. This role frequently involves staying updated with the latest Semantic Web standards and tools, ensuring that data solutions are robust, scalable, and aligned with organizational needs.

What is a Semantic Web job?

A Semantic Web job involves working with technologies that enhance data interoperability and meaning on the web. Professionals in this field use standards like RDF, OWL, and SPARQL to structure and link data, making it machine-readable and semantically rich. Roles may include developing knowledge graphs, ontologies, and linked data applications to improve search, AI, and data integration. These jobs are common in industries like AI, research, and enterprise data management.

What are the key skills and qualifications needed to thrive in the Semantic Web position, and why are they important?

To thrive in a Semantic Web role, you need a strong background in computer science, expertise in data modeling, ontologies, and RDF/OWL, often supported by a relevant degree. Familiarity with semantic technologies such as SPARQL, Protégé, and graph databases, as well as certifications in linked data or Semantic Web technologies, is highly beneficial. Strong analytical thinking, problem-solving skills, and the ability to work effectively in interdisciplinary teams are standout soft skills. These abilities are crucial for designing, implementing, and maintaining systems that enable smarter data integration and retrieval across complex datasets.

More about Semantic Web jobs
What cities are hiring for Semantic Web jobs? Cities with the most Semantic Web job openings:
What are the most commonly searched types of Semantic Web jobs? The most popular types of Semantic Web jobs are:
What states have the most Semantic Web jobs? States with the most job openings for Semantic Web jobs include:
What job categories do people searching Semantic Web jobs look for? The top searched job categories for Semantic Web jobs are:
Semantic Web jobs near you
Infographic showing various Semantic Web job openings in the United States as of July 2026, with employment types broken down into 3% As Needed, 85% Full Time, 6% Part Time, 3% Contract, and 3% Nights. Highlights an 73% Physical, 4% Hybrid, and 23% Remote job distribution, with an average salary of $122,736 per year, or $59 per hour.
Ontology Engineer (TS/SCI)

Ontology Engineer (TS/SCI)

Maxar Technologies, Inc.

Herndon, VA • On-site

Full-time

Retirement

Posted 12 days ago

Job description

Vantor is forging the new frontier of spatial intelligence, helping decision makers and operators navigate what's happening now and shape what's coming next. Vantor is a place for problem solvers, changemakers, and go-getters-where people are working together to help our customers see the world differently, and in doing so, be seen differently. Come be part of a mission, not just a job, where you can: Shape your own future, build the next big thing, and change the world.
To be eligible for this position, you must be a U.S. Citizen. This position requires an active U.S. Government security clearance, applicants who do not currently hold the required clearance will not be eligible for consideration. Employment for cleared roles is contingent upon verification of clearance status.
Export Control/ITAR: Certain roles may be subject to U.S. export control laws, requiring U.S. person status as defined by 8 U.S.C. 1324b(a)(3).
Please review the job details below.
This position requires an active U.S. Government Security Clearance at the TS/SCI level with CI polygraph.
Vantor is seeking an Ontology Lead to join our team. In this position you will design, develop, and maintain domain-specific ontologies and knowledge models in support of Object Based Intelligence (OBI) mission requirements.
The Lead Ontologist serves as the technical authority for the design, development, and maintenance of domain-specific ontologies and knowledge models that support Object-Based Intelligence (OBI) mission requirements. This position applies semantic technologies and knowledge representation methodologies to enable data interoperability, advanced analytics, and knowledge integration across diverse data sources and object-management systems. Leveraging Semantic Web standards, including RDF, OWL, and SPARQL, the Lead Ontologist develops scalable knowledge frameworks that enhance data discoverability, support AI/ML applications, and facilitate effective knowledge transfer to Government stakeholders.
Responsibilities:
  • In coordination with domain experts, design, develop, and maintain domain-specific ontologies, taxonomies, and knowledge graphs that support Object-Based Intelligence mission objectives.
  • Apply Semantic Web standards and technologies, including RDF, OWL, SHACL, and SPARQL, to model, represent, and query complex data relationships.
  • Establish and maintain semantic data integration frameworks that enable interoperability across internal and external object-management systems.
  • Collaborate with analysts, data scientists, engineers, and Government stakeholders to capture requirements and translate mission needs into formal knowledge models.
  • Develop and maintain ontology governance processes, standards, documentation, and version-control practices to ensure consistency and scalability.
  • Support AI/ML initiatives by providing structured knowledge representations that enhance model explainability, interpretability, and contextual reasoning.
  • Conduct ontology validation, testing, and quality assurance activities to ensure accuracy, completeness, and alignment with mission requirements.
  • Provide technical leadership, mentoring, and knowledge transfer activities to Government personnel and project team members on ontology development methodologies and semantic technologies.

Minimum Qualifications:
  • Must be a US citizen and have an active TS/SCI with CI poly.
  • 12 years of experience and an advanced degree or 17 years of experience with a bachelor's degree.
  • Demonstrated experience designing and implementing ontologies, taxonomies, or knowledge graphs in operational or research environments.
  • Experience applying Semantic Web technologies, including RDF, OWL, and SPARQL.
  • Knowledge of ontology engineering methodologies, data modeling principles, and semantic interoperability frameworks.
  • Ability to communicate complex technical concepts effectively to both technical and non-technical stakeholders.

Preferred Qualifications:
  • Experience developing and maintaining enterprise knowledge graphs and integrating heterogeneous data sources.
  • Familiarity with AI/ML workflows and the use of ontologies to improve model explainability, reasoning, and decision support.
  • Experience providing technical leadership, mentoring, and formal knowledge transfer to Government personnel or large multidisciplinary teams.
  • Certified Data Management Professional (CDMP) or equivalent data architecture certification.
  • Certified Knowledge Manager (CKM) or comparable knowledge management credential.
  • Formal training or certification in Semantic Web technologies, knowledge graphs, ontology engineering, RDF, OWL, or SPARQL.

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Pay Transparency: To support pay transparency, Vantor includes salary ranges in all U.S. job postings. Starting pay for this role will fall within the listed range and will be based on factors such as experience, qualifications, skills, location, and market conditions. Candidates who meet the minimum requirements for the role should not expect to receive compensation at the top of the range. The listed range reflects the expected pay for this position, and final offers will be determined based on each candidate's experience, expertise, and alignment with the role.
• The base pay for this position within the Washington, DC metropolitan area is: $137,000.00 - $182,000.00 - $200,200.00 annually.
For all other states, we use geographic cost of labor as an input to develop market-driven ranges for our roles, and as such, each location where we hire may have a different range.
Benefits: Vantor offers a competitive total rewards package that goes beyond the standard, including a robust 401(k) with company match, mental health resources, and unique perks like student loan repayment assistance, adoption reimbursement and pet insurance to support all aspects of your life. You can find more information on our benefits at: https://www.Vantor.com/careers
The application window is three days from the date the job is posted and will remain posted until a qualified candidate has been identified for hire. If the job is reposted regardless of reason, it will remain posted three days from the date the job is reposted and will remain reposted until a qualified candidate has been identified for hire.
The date of posting can be found on Vantor's Career page at the top of each job posting.
To apply, submit your application via Vantor's Career page.
EEO Policy: Vantor is an equal opportunity employer committed to an inclusive workplace. We believe in fostering an environment where all team members feel respected, valued, and encouraged to share their ideas. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, sex, gender identity, sexual orientation, disability, protected veteran status, age, or any other characteristic protected by law.
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About Maxar Technologies

Sourced by ZipRecruiter

Maxar Technologies, headquartered in Denver, CO, US, is a space technology company established in 1969. Operating in the Aerospace Industry, Maxar's key areas of business include Earth Intelligence and Space Infrastructure. The products they offer are critical for global communications, environmental monitoring, national security, intelligence operations, disaster response, and more. Passionate about unlocking the potential of space, Maxar's mission is "to build a better world by harnessing space technology". The company prides itself on advancing state-of-the-art technology, delivering exceptional customer service, and driving growth.

Industry

Space research administration

Company size

1,001 - 5,000 Employees

Headquarters location

Denver, CO, US

Year founded

1969

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