Senior Manufacturing Engineer

Position Summary

The Senior Manufacturing Engineer provides technical leadership for manufacturing operations supporting both existing products and new product introductions, with a strong emphasis on plastic injection molding processes, tooling, automation, and process optimization.

What You’ll Do

• Lead Design for Manufacturing (DFM) and Design for Assembly (DFA) efforts focused on injection molded components, improving manufacturability, quality, and cost.
• Develop, validate, and optimize injection molding processes, tooling, fixtures, automation systems, and secondary operations.
• Establish and refine molding parameters (fill, pack, hold, cooling, resin drying, cycle time) using scientific molding principles.
• Support mold design reviews, tooling qualification, first article inspection, and production readiness.
• Troubleshoot molding defects such as flash, sink, short shots, warp, splay, burns, and dimensional variation.
• Partner with tooling vendors, resin suppliers, and automation integrators to improve mold performance and uptime.
• Evaluate and implement advanced manufacturing technologies including robotics, vision systems, and smart manufacturing solutions.
• Lead new product introduction (NPI), process validation (IQ/OQ/PQ), DOE studies, and production launch readiness.
• Develop scalable manufacturing strategies that support growth, efficiency, and long-term performance.
• Author and maintain key documentation including PFMEA, control plans, work instructions, and process flows.
• Lead engineering changes including tolerance analysis, resin evaluation, and mold/process improvements.
• Serve as technical lead for complex manufacturing and quality challenges, driving root cause analysis and corrective actions.
• Drive continuous improvement using Lean, Six Sigma, Kaizen, and scientific molding methodologies.
• Mentor Manufacturing Engineers and Process Technicians, supporting technical growth and capability development.
• Partner cross-functionally with Engineering, Operations, Quality, Supply Chain, and external stakeholders to achieve business objectives.

What You Bring

• Required: Bachelor's degree in Mechanical Engineering, Manufacturing Engineering, Industrial Engineering, Plastics Engineering, or related field.
• 5+ years of manufacturing engineering experience, ideally supporting injection molding or high-volume production environments.
• Hands‑on experience with injection molding process development, scientific molding, tooling validation, and troubleshooting.
• Preferred: Experience with automation, robotics, vision systems, or advanced manufacturing technologies.
• Knowledge of engineered thermoplastics, resin behavior, and mold flow principles.
• Deep understanding of injection molding processes, tooling design, and process optimization.
• Strong troubleshooting capability across molding defects, cycle optimization, and process stability.
• Experience with validation (IQ/OQ/PQ), DOE, SPC, and statistical analysis.
• Knowledge of GD&T, tolerance analysis, and plastic part design considerations.
• Familiarity with Lean manufacturing and continuous improvement methodologies.
• Strong analytical and data‑driven problem‑solving skills.
• Ability to lead complex projects and influence cross‑functional teams.
• Excellent documentation and process standardization practices.
• Effective communicator with the ability to work across all levels of the organization.
• Passion for innovation, continuous improvement, and technical excellence.

Benefits

• Competitive compensation.
• 401(k) with company match.
• Medical, dental, and vision coverage.
• Paid vacation and holidays.
• Access to Marmon Holdings company‐wide initiatives.

We are an equal opportunity employer, and all applicants will be considered for employment without attention to their membership in any protected class.