Ontology Architect and Knowledge Modeling Specialist - SME

Accenture Federal Services; Chantilly (VA); On-site; USD 110,000 - 214,000; Full time

Job summary

Accenture Federal Services seeks a seasoned Semantic Architect to lead architecture, design, and implementation of enterprise knowledge graphs and ontologies. You will transform unstructured data into interconnected, machine-readable intelligence to enable semantic search and AI capabilities.

You will collaborate with data scientists and software engineers to integrate semantic frameworks with enterprise graph databases and AI pipelines, establishing governance and quality controls across

Qualifications

• Bachelor's degree required.
• 10 years of experience in semantic architecture or related field.
• US Citizenship with Active TS/SCI CIP.
• Proficiency in semantic web standards: OWL, RDF, SHACL.
• Experience with enterprise graph databases (GraphDB, Neo4j).
• Strong collaboration with cross-functional teams.
• Expertise in designing and implementing semantic schemas and frameworks.
• Familiarity with Retrieval-Augmented Generation and vector search workflows.

Responsibilities

• Engineer domain-specific ontologies, taxonomies, and vocabularies using OWL/RDF/SHACL.
• Design semantic schemas for interoperability and metadata management.
• Collaborate with data scientists, engineers, and AI architects to integrate semantic frameworks with graph databases and AI pipelines.
• Establish data governance, validation workflows, and data harmonization to ensure data quality.
• Translate complex business domains into structured semantic models for entity resolution and context-aware AI.

Skills

TS/SCI CIP

Bachelor's degree

10 years experience

OWL RDF SHACL

GraphDB Neo4j

Collaboration

Semantic schemas

RAG and vector search

Education

Bachelor's degree

Tools

OWL

RDF

SHACL

GraphDB

Neo4j

Job description

At Accenture Federal Services, nothing matters more than helping the US federal government make the nation stronger and safer and life better for people.Our 13,000+ people are united in a shared purpose to pursue the limitless potential of technology and ingenuity for clients across defense, national security, public safety, civilian, and military health organizations.

Join Accenture Federal Services, a technology company within global Accenture. Recognized as a Glassdoor Top 100 Best Place to Work, we offer a collaborative and caring community where you feel like you belong and are empowered to grow, learn and thrive through hands-on experience, certifications, industry training and more.

Join us to drive positive, lasting change that moves missions and the government forward!

Who you’ll be

We are seeking a seasoned Semantic Architect to lead the architecture, design, and implementation of enterprise knowledge graphs and ontological models. The role is pivotal in transforming unstructured data into interconnected, machine-readable intelligence, enabling advanced semantic search and AI capabilities.

What you’ll do

• Engineer domain-specific ontologies, taxonomies, and controlled vocabularies using semantic web standards such as OWL, RDF, and SHACL.
• Design semantic schemas to ensure cross-system interoperability, advanced inference, and robust metadata management.
• Collaborate with data scientists, software engineers, and AI architects to integrate semantic frameworks with enterprise graph databases and AI pipelines.
• Establish data governance, validation workflows, and data harmonization pipelines to enforce data quality and eliminate information silos.
• Translate complex business domains into structured semantic models to enable entity resolution and context-aware AI capabilities.

What you need

• US Citizen with Active TS/SCI CIP
• Bachelor’s degree required
• 10 years of experience in semantic architecture or a related field
• Proficiency in semantic web standards and tools such as OWL, RDF, and SHACL
• Experience with enterprise graph databases (e.g., GraphDB, Neo4j)
• Strong collaboration skills with cross-functional teams
• Expertise in designing and implementing semantic schemas and frameworks
• Familiarity with modern AI pipelines, including Retrieval-Augmented Generation and vector search structures

As required by local law, Accenture Federal Services provides reasonable ranges of compensation for hired roles based on labor costs in the states of California, Colorado, Connecticut, Hawaii, Illinois, Maine, Maryland, Massachusetts, Minnesota, New Jersey, New York, Ohio, Vermont, Virginia, Washington, and the District of Columbia. The base pay range for this position in these locations is shown below.

The base pay range for this position in these locations is shown below. Compensation for roles at Accenture Federal Services varies depending on a wide array of factors, including but not limited to office location, role, skill set, and level of experience. Accenture Federal Services offers a wide variety of benefits. You can find more information on benefits here. We accept applications on an on-going basis and there is no fixed deadline to apply.

The pay range for the states of California, Colorado, Connecticut, Hawaii, Illinois, Maine, Maryland, Massachusetts, Minnesota, New Jersey, New York, Ohio, Vermont, Virginia, Washington, and the District of Columbia is:

$109,500—$213,500 USD

What We Believe

As a company wholly dedicated to serving the US federal government, we bring together the best talent to help reinvent how federal agencies operate and deliver greater value for their mission and the American people. We have an unwavering commitment to creating a culture in which all our people are respected, feel a sense of belonging, and have equal opportunity. As a business imperative, every person at Accenture Federal Services has the responsibility to create and sustain a culture where everyone feels welcomed and included. This is grounded in our core values and our experience that hiring and developing great people who reflect different perspectives, experiences, and backgrounds is key to driving innovation and delivering the results that our clients and the country count on.

Equal Employment Opportunity Statement

We believe that no one should be discriminated against because of their differences. All employment decisions shall be made without regard to age, race, creed, color, religion, sex, national origin, ancestry, disability status, veteran status, sexual orientation, gender identity or expression, genetic information, marital status, citizenship status or any other basis as protected by federal, state, or local law. Our rich diversity makes us more innovative, more competitive, and more creative, which helps us better serve our clients and our communities. For details, view a copy of the Accenture Federal Services Equal Opportunity Policy Statement.

Accenture Federal Services is an Equal Employment Opportunity employer. Additionally, as an affirmative action employer for veterans and individuals with disabilities, Accenture Federal Services is committed to providing veteran employment opportunities to our service men and women.

Requesting An Accommodation

Accenture Federal Services is committed to providing equal employment opportunities for persons with disabilities or religious observances, including reasonable accommodation when needed. If you are hired by Accenture Federal Services and require accommodation to perform the essential functions of your role, you will be asked to participate in our reasonable accommodation process. Accommodations made to facilitate the recruiting process are not a guarantee of future or continued accommodations once hired.

If youare being considered for employment opportunities with Accenture Federal Services andneed anaccommodation for a disability or religious observanceduring the interview process or for the job you are interviewing for, please speak with your recruiter.

Other Employment Statements

Applicants for employment in the US must have work authorization that does not now or in the future require sponsorship of a visa for employment authorization in the United States.

Candidates who are currently employed by a client of Accenture Federal Services or an affiliated Accenture business may not be eligible for consideration.

Job candidates will not be obligated to disclose sealed or expunged records of conviction or arrest as part of the hiring process.

The Company will not discharge or in any other manner discriminate against employees or applicants because they have inquired about, discussed, or disclosed their own pay or the pay of another employee or applicant. Additionally, employees who have access to the compensation information of other employees or applicants as a part of their essential job functions cannot disclose the pay of other employees or applicants to individuals who do not otherwise have access to compensation information, unless the disclosure is (a) in response to a formal complaint or charge, (b) in furtherance of an investigation, proceeding, hearing, or action, including an investigation conducted by the employer, or (c) consistent with the Company's legal duty to furnish information.

California requires additional notifications for applicants and employees. If you are a California resident, live in or plan to work from Los Angeles County upon being hired for this position, please click here for additional important information.