Engineering Project Specialist – Mechanical
Castelion
Torrance, CAMechanical Engineer$95k–$160kPosted Jul 14, 2026
Engineering Project Specialist – Mechanical
Torrance, California, United States
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Engineering Project Specialist – Mechanical
About the job Engineering Project Specialist – Mechanical
About Castelion
Castelion is bringing a new approach to defense development and production: one that focuses on short, iterative design cycles, rapid testing in development, and modern commercial manufacturing strategies for production at scale. We're designing, building, and testing next generation long range strike weapons systems to give America and its Allies a definitive edge and deter future conflicts.
Position Summary
The Engineering Project Specialist – Mechanical supports the planning, coordination, and execution of mechanical engineering projects from concept through production. This role serves as the link between engineering, manufacturing, supply chain, and project management by maintaining product configurations, managing Bills of Materials (BOMs), coordinating engineering changes, and tracking project schedules and deliverables. The position also provides hands-on engineering support through CAD model and drawing updates, documentation control, and configuration management to ensure products are accurately released and maintained throughout their lifecycle.
Essential Responsibilities
Manage and maintain engineering Bills of Materials (BOMs) for new and existing mechanical products.Maintain CAD assemblies, part configurations, and engineering documentation within the company's CAD and Product Lifecycle Management (PLM) systems.Perform minor mechanical CAD modeling and drawing revisions under the direction of design engineers, including dimension updates, tolerance changes, and documentation corrections.Coordinate the Engineering Change Request (ECR) and Engineering Change Order (ECO) process, ensuring design changes are accurately documented, reviewed, approved, and released.Monitor project schedules, engineering deliverables, milestones, and key performance metrics to support on-time project completion.Track design release status, prototype builds, testing activities, and production readiness.Ensure engineering documentation, drawings, and specifications comply with company drafting standards and revision control requirements.Support mechanical engineers with prototype builds, manufacturing documentation, and design verification activities.Coordinate with Manufacturing, Quality, Supply Chain, and Production to implement engineering changes and support new product introductions.Assist with configuration management throughout the product lifecycle, ensuring product structures and documentation remain accurate and traceable.Develop and maintain project dashboards, schedules, and status reports for engineering leadership.Identify opportunities to improve engineering workflows, documentation practices, and change management processes.
Required Qualifications
Associate's or Bachelor's degree in Mechanical Engineering, Mechanical Engineering Technology, Aerospace Engineering, or a related technical discipline.2–5 years of experience supporting mechanical engineering or new product development projects in a manufacturing environment.Working knowledge of mechanical design principles, engineering drawings, geometric dimensioning and tolerancing (GD&T), and manufacturing processes.Experience managing engineering Bills of Materials (BOMs) and product configurations.Proficiency with 3D CAD software such as SolidWorks, Creo, Inventor, or similar.Experience with Product Lifecycle Management (PLM), Product Data Management (PDM), or Enterprise Resource Planning (ERP) systems.Strong organizational, analytical, and problem-solving skills.Excellent communication and cross-functional coordination abilities.Proficiency in Microsoft Excel, Project, and other project tracking tools.
Preferred Qualifications
Experience supporting new product introduction...