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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Principal Software Engineer / Data Engineer (Onsite) - **Company:** RTX - **Location:** Richardson, TX, United States - **Experience:** Expert - **Salary:** $107,500.0 - $204,500.0 - **Contract:** Permanent contract - **Skills:** Agile Methodology, Artificial Intelligence, Amazon Web Services, Microsoft Azure, Data Governance, Query Languages, DevOps, Programming Tools, Graph Database, Linked Data, Machine Learning, Meta-Data Management, Neo4j, NoSQL, Operational Data Store, Resource Description Framework (RDF), Semantic Web, SPARQL, SQL Databases, Enterprise Data Management, Digital Twin, Feature Engineering, Delivery Pipeline, Large Language Models, Generative AI, SC Clearance, Knowledge Representation, Microsoft Fabric, Data Lineage, Cosmos DB, Machine Learning Operations, Tools for Reporting, Physical Data Models - **Published:** August 30, 2026 - **Apply:** https://dejobs.org/x/x/59E1CECB1547450090C51CCEBF817FD9/job/ ## About the Role * Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and 8 years of relevant experience. * Experience in using OWL, RDF, RDFS, SPARQL, and related W3C semantic web standards. * Experience with ontology development tools such as Protégé, TopBraid Composer, or similar. * Experience in developing conceptual, logical, and physical data models, as well as canonical data designs * Experience with graph databases (e.g., Stardog, Neo4j, Amazon Neptune, Azure Cosmos DB for Gremlin) and graph query languages. * Experience collaborating in cross-functional Agile or DevOps environments. * Active and transferable TS/SCI U.S. government issued security clearance is required prior to start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance Qualifications We Prefer * Experience with data fabric, data mesh, Lakehouse architectures, and cloud platforms (Azure, AWS). * Background supporting digital thread, digital twin, and AI/ML programs. * Experience mentoring or leading data modeling teams. * Knowledge of linked data principles and experience publishing or consuming linked datasets. * Exposure to ML/AI pipelines and practical experience enhancing them through semantic enrichment. * Experience with LLM-grounded knowledge graphs or retrieval-augmented generation (RAG) pipelines. * Excellent analytical thinking with ability to translate ambiguous business requirements into formal semantic models. * Demonstrated ability to collaborate with cross-functional teams to model complex business domains. * Strong skills in SQL, SPARQL, Cypher, and relational/NoSQL databases. * Strong understanding of data governance, metadata management, and master data management (MDM) principles. ## Description RTX is seeking a Data Engineer for an immediate position onsite in our Richardson, TX or Dulles, VA office . The Data Engineer will be a key contributor to our program, responsible for designing semantic data models, ontologies, and knowledge graphs that serve as the connective tissue between raw operational data and AI-ready intelligence., * Design, build, and maintain enterprise ontologies and knowledge graphs using standards such as OWL, RDF, and SPARQL. * Collaborate with domain experts, data engineers, and business stakeholders to capture and formalize business concepts, relationships, and rules. * Develop and manage taxonomies, controlled vocabularies, and semantic metadata schemas across operational and business domains. * Integrate ontological structures with enterprise data platforms, AI/ML pipelines, and analytics environments. * Partner with AI/ML Engineers and data scientists to ensure ontology structures support downstream model training, feature engineering, and inference pipelines. * Define and enforce data governance standards for entity definitions, lineage tracking, and metadata management across enterprise platforms. * Monitor ontology performance and usage patterns; proactively identify gaps and drive continuous improvement. * Support integration of ontology layers with enterprise data products, dashboards, and reporting tools. * Evaluate and implement ontology management tools and platforms, ensuring scalability and interoperability. * Translate complex technical concepts into clear documentation for both technical and non-technical audiences. * Stay current with advancements in knowledge representation, semantic web technologies, and AI/ML techniques., * Please consider the following role type definition as you apply for this role. Onsite: Employees who are working in Onsite roles will work primarily onsite. This includes all production and maintenance employees, as they are essential to the development of our products. * This position requires a security clearance. DCSA Consolidated Adjudication Services (DCSA), an agency of the Department of Defense, handles and adjudicates the security clearance process. More information about Security Clearances can be found on the US Department of State government website here: https://www.state.gov/m/ds/clearances/c10978.htm * We Are RTX #RaytheonSpace As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as on-site, hybrid or remote. ## Related Videos - [Leveraging Real time data in FSIs](https://www.wearedevelopers.com/videos/806-leveraging-real-time-data-in-fsis) - [Putting the Graph In GraphQL With The Neo4j GraphQL Library](https://www.wearedevelopers.com/videos/257-putting-the-graph-in-graphql-with-the-neo4j-graphql-library) - [From Messy Queries to Scalable Systems - How Data Engineering actually works](https://www.wearedevelopers.com/videos/100203-from-messy-queries-to-scalable-systems-how-data-engineering-actually-works) - [NoSQL Data Modeling for Front-end Developers](https://www.wearedevelopers.com/videos/297-nosql-data-modeling-for-front-end-developers) - [Modern Data Architectures need Software Engineering](https://www.wearedevelopers.com/videos/1030-modern-data-architectures-need-software-engineering) - [Cyber Sleuth: Finding Hidden Connections in Cyber Data](https://www.wearedevelopers.com/videos/893-cyber-sleuth-finding-hidden-connections-in-cyber-data) ## Related Articles - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Graph and AI Trends 2026: Why Is AI Running but Not Yet Delivering?](https://www.wearedevelopers.com/magazine/680-graph-and-ai-trends-2026-why-is-ai-running-but-not-yet-delivering) - [Data Engineer Salary UK](https://www.wearedevelopers.com/magazine/253-data-engineer-salary-uk) - [How to Become an AI Engineer](https://www.wearedevelopers.com/magazine/331-how-to-become-an-ai-engineer) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers)