The Principal Data Flow Engineer is a senior technical leader responsible for designing, integrating, and sustaining enterprise-scale dataflow architectures that support mission-critical analytics across secure cloud and distributed environments. This role oversees high-availability Linux and Cloudera Hadoop infrastructures, develops and maintains end-to-end dataflow solutions using technologies such as Niagara files and XKS, and ensures reliable, secure, and compliant data ingestion, processing, and delivery. The position also leads automation, monitoring, troubleshooting, and DevOps initiatives to improve system performance and operational efficiency while coordinating across engineering, operations, analytics, and stakeholder teams to deploy scalable, resilient, and mission-focused dataflow capabilities. Primary Responsibilities • Lead the design, integration, and sustainment of complex enterprise dataflow architectures supporting mission-critical analytics, ensuring reliable ingestion, processing, routing, and delivery across large-scale cloud and distributed environments. • Manage and optimize high-availability Linux and Cloudera Hadoop cloud infrastructures, including virtual machines, storage containers, and enterprise data repositories, to support thousands of secure operational dataflows. • Engineer and maintain end-to-end dataflow solutions using technologies such as Niagarafiles and XKS, and related processing systems, ensuring schema compatibility, metadata integrity, and proper data governance throughout the lifecycle. • Develop and implement monitoring, troubleshooting, and automation strategies utilizing system instrumentation, cron scripting, logging, and operational monitoring tools to improve system continuity, performance, and incident response capabilities. • Provide technical leadership for DevOps and Agile/Scrum initiatives, including task prioritization, workflow modernization, requirements management, and cross-functional coordination to improve operational efficiency and team performance. • Ensure compliance with enterprise security, classification, and data handling requirements by applying deep knowledge of intelligence community governance policies, access controls, and secure data routing methodologies. • Coordinate across engineering, operations, analytics, and stakeholder organizations to deploy new capabilities, transition systems into production, establish standard operating procedures, and support enterprise-wide mission objectives through scalable and resilient dataflow solutions. Basic Qualifications • Bachelor's degree in a Qualified Engineering Field or related discipline from an accredited college or university with twenty (20) years of systems engineering experience. In lieu of a bachelor's degree, candidates may qualify with a master's degree and eighteen (18) years of experience, a PhD and sixteen (16) years of experience, or twenty-four (24) years of systems engineering experience with no degree. • Security Clearance Requirement: Active TS/SCI with polygraph conmd kqw Original Posting: May 19, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above. Pay Range: Pay Range $154,050.00 - $278,475.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.