Knowledge Graph Data Engineer

ATS is currently seeking a highly experienced and motivated Knowledge Graph Data Engineer w/ TS/SCI w/ Polygraph in Bethesda, MD to build the data and retrieval foundation for a Graph RAG application. The system combines a property graph, vector search, and database queries with a LangGraph agent. You will help turn information from multiple sources into reliable graph data and make it accessible through retrieval APIs and MCP tools.

Role Description:  

• Build Python pipelines to ingest, clean, chunk, enrich, and index structured and unstructured data.
• Model entities and relationships in a property graph, preserving provenance and links to source material.
• Develop entity extraction and resolution workflows that connect information across sources.
• Build embedding pipelines and maintain vector indexes for semantic search.
• Implement hybrid retrieval that combines vector search, keyword search, graph traversal, and database queries.
• Develop and integrate MCP servers and tools that expose vector search capabilities to a LangGraph agent.
• Integrate the Oracle MCP server so the agent can query relevant database data.
• Apply graph algorithms to identify connections and improve retrieval.
• Evaluate graph quality, retrieval relevance, answer grounding, and pipeline reliability.
• Collaborate with application engineers and stakeholders to turn use cases into graph models, retrieval workflows, and agent tools.

Required qualifications

• Strong computer science fundamentals, including data structures, algorithms, software design, and testing.
• Proficiency in Python and experience building maintainable data pipelines or backend services.
• Working knowledge of cloud fundamentals, including compute, storage, networking, security, and deployment.
• Hands-on experience with property graph modeling, queries and traversals, and graph algorithms.
• Experience with embeddings, vector indexes, and semantic or hybrid search.
• Understanding of retrieval-augmented generation and how to evaluate the quality of retrieved context.
• Ability to work with inconsistent or incomplete data and communicate technical decisions clearly.

Preferred qualifications:

• Experience with Oracle Cloud Infrastructure (OCI), Oracle Database, or Oracle Property Graph.
• Experience building agents with LangGraph or a similar framework.
• Experience developing or integrating Model Context Protocol (MCP) servers and tools.
• Familiarity with entity resolution, information extraction, or knowledge graph construction.
• Experience with CI/CD, containers, infrastructure as code, and production monitoring.

Required Credentials:

• 10+ years of experience relevant to this position.
• Bachelor’s Degree in engineering, Math or computer science.  Master’s degree preferred.

Acclaim Technical Services (ATS), founded in 2000, is a premier provider of tech-enabled solutions and operational services to a broad range of U.S. Federal agencies. As an Employee Stock Ownership Plan (ESOP) company—an uncommon advantage in our sector—we foster a culture of ownership, accountability, and shared success. This commitment to our people shows: ATS is consistently recognized as a top workplace in the DC area and continues to experience strong, strategic growth.

Salary Transparency: There are many factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employee owners value the flexibility at ATS that allows them to balance quality work and their personal lives. We offer competitive compensation, career growth, benefits and learning and development opportunities. Our broad mix of exceptional benefits options is designed to support and protect employees and their families. At ATS, you will be eligible to participate in a comprehensive benefits package such as healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits. Learn more at Employee Resources

EQUAL EMPLOYMENT OPPORTUNITY (EEO) STATEMENT: ATS is committed to a program of equal employment opportunity without regard to race, color, ethnicity, national origin, ancestry, citizenship, sex, pregnancy, marital status, sexual orientation, age, religion/creed, hairstyles and hair textures, handicap/disability, genetic information/history, military/veteran status, or any other characteristic or condition protected by applicable law. We support the employment and advancement in employment of individuals with disabilities and of protected veterans, and we treat qualified individuals without discrimination on the basis of their physical or mental disability or veteran status.