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# Senior Data Engineer

- **Company:** CASTALIA SYSTEMS LLC
- **Location:** Arlington, VA, United States
- **Experience:** Expert
- **Salary:** $150,000.0 - $160,000.0
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Data Analysis, Systems Engineering, Cyber Security, Databases, Data Cleansing, Data Transmissions, Relational Databases, Database Design, Graph Database, Information Theory, Python (Programming Language), PostgreSQL, Machine Learning, MySQL, NoSQL, Scrum Methodology, Server Administration, SQLite, SQL Databases, Data Processing, System Availability, Data Lakes, Qlikview, Apache Nifi, Data Management, Data Pipelines
- **Published:** September 22, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9183154/senior-data-engineer

## About the Role

* BS Degree.
 * 8+ years of professional experience needed for MOST of our opportunities.
 * Python experience with data manipulation, scripting, and more.
 * Databricks experience.
 * Proficient in designing and implementing Extract Transform Load (ETL) data processes.
 * Experience with at least ONE relational database, such as PostgreSQL, MySQL or SQLite.
 * Experience with Agile SCRUM methodologies.

Preferred Qualifications

 * Familiar with database design, server management, connection protocols, database normalization, and principles of information theory.
 * Experience with data cleaning or data organization.
 * Familiar with NiFi, SQL, NoSQL and Graph Databases and Data Lakes.
 * Familiar with Dashboarding tools similar to Qlik.
 * Familiar with Cybersecurity with design and implementation of unique data transfer protocols.

Physical Requirements/Work Environment

 * ONSITE 3-5 days per week.
 * Normal office environment.

## Description

Castalia is seeking exceptional Senior Level Data Engineers to join our expanding team. In this role, you will be responsible for ensuring data availability-including the seamless movement, modification, and storage of critical data. Working closely with Software Engineers and Data Scientists, you will ensure the scalability and successful deployment of data pipelines that support high-priority users.

The Mission

Our team develops and deploys cutting-edge AI and Machine Learning applications that directly support national security missions. We empower 19 key Principal Staff members (Senior Executive Service and General Officers) within the Office of the Undersecretary of Defense (OUSD) and the Intelligence Community. Your work will provide these leaders with the critical, data-driven insights necessary for strategic decision-making.

Candidate Profile

The ideal candidate is a motivated technologist who thrives with limited direction and is passionate about continuous learning. We are looking for engineers who can pivot quickly to new languages and technologies to solve complex problems.