Gloucester location - hybrid working when possibleMust hold active Enhanced DV Clearance (West)Competitive Salary DOE - 6% bonus, 25 days holiday, clearance bonusExperience in Data Pipelines, ETL processing, Data Integration, Apache, SQL/NoSQL, Team Leadership Who Are We? Our client is a trusted and growing supplier to the National Security sector, delivering mission-critical solutions that help keep the nation safe, secure, and prosperous. You''ll work with cutting-edge technologies, including AI/Data Science, Cyber, Cloud, DevOps/SRE, and Platform Engineering. They have long-term contracts secured across the latest customer framework and are set for significant growth. What will the Lead Data Engineer be Doing? You will develop mission-critical data solutions for National Security clients, working with cutting-edge technologies such as AI/DS, Cyber, Cloud, DevOps/SRE, and Platform Engineering. You''ll collaborate directly with customers across National Security, Defence, and Intelligence to solve complex, high-stakes challenges. The role involves designing and implementing sophisticated data pipelines to connect operational systems with analytics and business intelligence platforms. Responsibilities include: Design, build, and maintain data pipelines, including ingestion, orchestration, and enrichmentDevelop data-streaming and ETL solutions (e.g. NiFi)Model databases and integrate data from diverse sourcesEnsure data quality, consistency, and securityMonitor and optimise