Senior Data Modeler

Onyx Government Services,LLC; Chantilly (VA, WA); On-site; USD 120,000 - 150,000; Part time

Job summary

Onyx Government Services, LLC is seeking a Sr. Data Modeler to design and implement an enterprise data model for a large government modernization effort. You will collaborate with stakeholders, enterprise architects, and OCIO contractors to support multiple data domains including permits, taxes, and licensing.

The role emphasizes hands-on data modeling, governance, and scalable architecture with a focus on regulatory and enterprise-wide data standards.

Qualifications

• Bachelor’s degree or equivalent professional experience in a related field.
• 7+ years of professional experience in data modeling or enterprise data architecture.
• Hands-on experience using Erwin Data Modeler is required.
• Experience creating conceptual, logical, and physical data models for large systems.
• Ability to translate business requirements into enterprise data models.
• Solid understanding of relational databases, normalization, and ER modeling.
• Experience documenting data definitions, rules, and governance policies.
• Strong communication with business stakeholders and technical teams.

Responsibilities

• Develop and implement an enterprise data model for a large gov tech modernization.
• Collaborate with business stakeholders, enterprise architects, and application teams.
• Document data models, business rules, and data definitions clearly.
• Support data integration, master data, and data governance across domains.

Skills

Data modeling

Enterprise data architecture

Relational database concepts

Data governance concepts

Stakeholder collaboration

Education

Bachelor's degree in Computer Science / Information Systems / Data Management

Tools

Erwin Data Modeler

Job description

Company Description

Onyx Government Services, LLC., is a Service-Disable Veteran-Owned Small Business (SDVOSB), headquartered in Fairfax, Virginia. We specialize in data management, integration, and analysis solutions to provide decision-ready information to Command and Control (C2) and Decision Support Systems. We have demonstrated expertise in the field of Information Technology, database & COTS integration, and custom software development. Onyx pairs subject matter and functional experts with developers to provide high quality, tailored solutions. In support of our various efforts, we have developed the Onyx Data Management Toolkit, a combination of Agile Development principles, COTS Integration, and custom software, to deliver flexible, cost-effective solutions to a variety of Department of Defense, Intelligence Community, and Law Enforcement agencies.

Position Overview

Onyx Government Service is seeking a Sr. Data Modeler to support the development and implementation of an enterprise data model for a large-scale government technology modernization initiative. The Senior Data Modeler will work closely with business stakeholders, enterprise architects, application teams, and an OCIO contractor to establish a scalable enterprise data model supporting multiple critical business domains, including permits, labels, formulas, and tax data.

Security Clearance:

Must possess active NACLC Public Trust security clearance

Note: This position is expected to be temporary and may be filled as a 1099 contract position.

Required Qualifications

• Bachelor’s degree in Computer Science, Information Systems, Data Management, or a related field, or equivalent professional experience.
• 7+ years of professional experience in data modeling, enterprise data architecture, or a related field.
• Demonstrated hands-on experience using erwin Data Modeler (required).
• Strong experience developing and maintaining conceptual, logical, and physical data models for complex enterprise systems.
• Experience translating complex business and functional requirements into enterprise data models.
• Strong understanding of relational database concepts, normalization, entity-relationship modeling, primary and foreign keys, data integrity, and data standards.
• Experience defining entities, attributes, relationships, business rules, and data definitions across multiple business domains.
• Experience working directly with business stakeholders, subject matter experts, architects, developers, and other technical teams to validate and refine data models.
• Experience developing enterprise data models that support multiple applications, business processes, and data domains.
• Strong understanding of enterprise data architecture, data integration, master data, reference data, and data governance concepts.
• Ability to document data models, business rules, data definitions, assumptions, and modeling decisions clearly.
• Strong communication and stakeholder-management skills, with the ability to facilitate data modeling sessions and explain complex data concepts to both technical and non-technical audiences.

Preferred Qualifications

• Experience supporting federal government or other highly regulated environments.
• Experience modeling regulatory, tax, permitting, licensing, compliance, or financial data.
• Experience designing data models for complex, large-scale enterprise systems.
• Experience collaborating with government agencies, OCIO organizations, contractors, and multiple technical teams.
• Experience with data governance, data standards, metadata management, and enterprise data management.
• Experience with modern cloud-based application and data architectures.
• Familiarity with APIs, data integration, and enterprise application architectures.
• Experience working in Agile/Scrum environments.