Manufacturing Engineer, Mechanical Assembly Torrance, CA LA Manufacturing – Mechanical Assembly

Manufacturing Engineer, Mechanical Assembly

• LA Manufacturing - Mechanical Assembly

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, ownership, and excellence are decisive advantages - and we're building a world-class team to turn bold ideas into real capability.

This is a rare opportunity to join at an early stage, where you'll have significant ownership, collaborate with exceptional teammates, and make a direct, measurable impact on our mission and the future of the company - regardless of your function.

Manufacturing Engineer, Mechanical Assembly

Castelion is seeking a highly skilled Manufacturing Engineer to develop, validate, and stand up the processes and tooling that turn mechanical assembly designs — actuators, mechanisms, and structural sub-assemblies — into repeatable, high-rate production. You will spend as much time on the floor as at your desk: designing fixtures, releasing work instructions, training operators, and driving process validation from first article through full-rate production.

The ideal candidate is comfortable owning a process end-to-end, from concept through PFMEA, qualification, and hands-on troubleshooting on the line.

Responsibilities

• Develop, validate, and release manufacturing processes, work instructions, and process specifications for mechanical assembly operations
• Design, procure, and qualify production tooling, fixtures, and manufacturing aids required for in-house production
• Lead process validation activities — first article inspections, process capability studies, and PFMEA — to qualify new processes for production
• Train and certify operators on new and revised processes, owning the process side of workforce ramp-up
• Establish process controls, manufacturing standards, and inspection requirements to ensure consistent product quality
• Partner with design engineering to provide DFM feedback and resolve build issues surfaced during production
• Own real-time troubleshooting on the assembly floor, driving containment and root-cause corrective action for quality, yield, and throughput issues
• Support the transition of processes from engineering development builds into documented, repeatable production, including workstation design and line layout
• Work cross-functionally with design, quality, supply chain, procurement, and program management to meet performance, schedule, and cost objectives

Basic Qualifications

• Bachelor's degree in mechanical engineering, manufacturing engineering, or aerospace engineering
• 3+ years of experience developing or validating manufacturing processes in a production, manufacturing, or experimental environment

Basic Qualifications

• Bachelor's degree in mechanical engineering, manufacturing engineering, or aerospace engineering
• 3+ years of experience developing or validating manufacturing processes in a production, manufacturing, or experimental environment

Preferred Skills and Experience

• Hands-on tooling and fixture design experience, from concept through fabrication and qualification
• Experience training or supervising production operators
• Strong understanding of the APQP framework, specifically Control Plans, DFMEA, PFMEA, and managing Significant/Critical Characteristics
• Previous involvement in a high-speed or high-output production environment, with hands-on experience on a production line
• Experience with automation, robotics, and flexible manufacturing systems
• Comfortable using hand tools, power tools, and fabrication equipment
• Familiarity with Atlassian tools such as Confluence and JIRA
• Excellent communication skills, both written and oral, along with effective teamwork abilities
• Ability to acclimate to frequently changing…