Chisomaga Nnaji
Plastics Engineer|| Polymer Engineer|| Material Scientist|| Process Engineer|| Leader|| Scholar|| Bs.Eng.|| Ms. Eng|| MBA|| Lean Six Sigma Black Belt||
- Role
- Plastics Process Engineer at Hunter Industries
- Location
- San Diego, US
- LinkedIn followers
- 500 followers
About Chisomaga Nnaji
Experienced Plastics/Polymer Engineer with a robust background in formulating…
Experience
Plastics Process Engineer
Nov 2016 — Present · San Marcos, CA, US
Spearheaded a comprehensive investigation into diaphragm material composition for valve products, optimizing compression molding processes and enabling efficient prototype production for early-stage testing. Served as the company’s polymer material expert—analyzing, characterizing, and recommending new polymers and additives to enhance product performance, reduce costs, and improve manufacturability. Led an acetal recycling initiative, performing detailed cost–benefit analyses for reprocessing injection‑molded acetal parts, demonstrating a strong commitment to sustainability and cost savings. Partnered with material compounders to develop innovative formulations, overseeing compounding operations to boost material properties and processability while driving continuous improvement. Resolved critical incoming material issues through in‑depth analysis and corrective actions, ensuring defect prevention and manufacturing reliability. Collaborated cross‑functionally with design, tooling, and quality teams during new product introductions, offering expert guidance in material selection, root cause analysis, and issue resolution to safeguard product integrity. Applied advanced statistical tools (DOE, SPC) to determine optimal molding parameters, improving part quality, aesthetics, and Overall Equipment Effectiveness (OEE). Trained and mentored technicians, building their independence, troubleshooting capabilities, and adherence to best manufacturing practices. Drove capital investment projects, exploring emerging technologies and managing vendor engagement, equipment evaluation, and justification to support strategic innovation.
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