Principal Build Reliability Engineer

Castelion
Torrance, CAEngineer$95k–$200kPosted Jul 14, 2026
Principal Build Reliability Engineer Torrance, California, United States Apply for Position Or refer someone Job Openings Principal Build Reliability Engineer About the job Principal Build Reliability Engineer Why Castelion, Why Now Castelion is moving incredibly fast to develop and deliver advanced defense systems at a time when execution matters more than ever. We believe focus and technical excellence are decisive advantages - and we are building a team that can deliver real capability, not just concepts. This is a rare opportunity to join at an early stage, where your work will directly shape critical systems, influence major technical decisions, and have immediate, real-world impact. Principal Build Reliability Engineer Castelion is seeking a Build Reliability Engineer to ensure the reliability of flight components and assemblies. This individual will evaluate product and process output data to drive improvements in manufacturing quality and actively represent quality objectives in design and development teams. Responsibilities This individual will evaluate product and process output data to drive improvements in manufacturing quality, and actively represent quality objectives in design and development teams Design for Manufacture Participating in Preliminary Design Review (PDR) / Critical Design Review (CDR) to ensure design for quality (DFQ), design for manufacturability (DFM), risk quantification and mitigation, and that appropriate test validation methods and inspection techniques, including nondestructive evaluation methods, have been considered Hands-on development of design for manufacturability through ensuring identification of key characteristics, prototype testing for manufacturability, First Article and Detailed Inspection planning, evaluation of previous non-conformances and lessons learned, and other manufacturing and quality tools as required Inspection and Test Process Development Leads inspection planning for new products through identification of features and gages, and integration with planned operations Designs or procures new measurement methods as required and integrates with existing processesValidates new and existing measurement and tests methods using process capability and measurement systems analysis (MSA) statistical toolsPropose solutions to remove the need to verify product conformance through measurement, e.g. poka-yokeFirst Build Reviews and Walk downsCo-ordinates, schedules and facilitates objective First Build Reviews to ensure transparency of design intent, design requirements, design and manufacturing risks, and manufacturability of designDevelop and maintains engineering walk down criteria for major product milestones to provide clear guidance to Production on engineering intent and acceptance criteriaIdentifies photo closeout requirements for complete as-built documentationEvaluates and analyzes production quality landscapeUses data to make landscape transparent and drive project prioritizationResponsible for ensuring that issues related to product reliability are primary focusDrives achievement of quality targets through a review hierarchy with appropriate levels of managementEnsure controls in place to prevent recurrenceRoot Cause and Corrective Action InvestigationsLeads, facilitates, and participates in root cause investigations in their respective areaDeep dives using appropriate quality or analysis tools as requiredEnsures documentation of cause and corrective action is captured appropriatelyEnsures appropriate actions to prevent recurrenceContainmentLeads activity to support containment of all suspect productsProvides guidance to quality inspectors, techs, and shop supervisors to assist in quarantining of all suspected productsCommunicate status of evaluation and disposition to production leadership on a regular basisIssue Ticket Review/Audit/ClosureSupports review of all issue tickets in respective areasEnsures rationale and...

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