Contract Injection Molding Jobs in Missouri (NOW HIRING)

Job Summary The Principal Engineer is a individual contributor who leads mechanical and electromechanical design for medical device development programs. This role is intended for a hands-on technical leader with strong mechanical aptitude, advanced SolidWorks capability, and practical injection molded plastic part design experience. The successful candidate will guide complex designs from concept through launch while mentoring engineers, improving design quality, and supporting manufacturable, reliable, and compliant products.

Responsibilities Lead mechanical architecture and detailed design of electromechanical medical device systems, mechanisms, housings, plastic components, and assemblies. Create, review, and release production-intent CAD models, assemblies, and engineering drawings using SolidWorks and applicable drafting standards, including GD&T. Apply design-for-manufacturing principles for injection molded plastic components, including draft, wall sections, ribs, bosses, snap-fits, parting lines, gating considerations, shrinkage, ejection, and cosmetic requirements.

Lead technical reviews, tolerance analysis, design risk assessment, DFMEA input, root-cause investigations, and engineering change activities. Collaborate with Quality, Regulatory, Manufacturing Engineering, Operations, Marketing, Supply Chain, suppliers, molders, toolmakers, and contract manufacturers. Support prototype builds, verification and validation testing, reliability activities, production transfer, and launch readiness.

Act as a technical mentor for engineers and designers in mechanical design, SolidWorks modeling discipline, drawing quality, GD&T, DFM, and production-focused problem solving. Qualifications Bachelor's degree in mechanical engineering or similar preferred Advanced degree is desired Preferred certifications: DFSS, SolidWorks (CSWA, CSWP, etc.) 4+ years of relevant mechanical or electromechanical product development experience. Advanced SolidWorks skills are required Knowledge of FDA Quality System Regulations (21 CFR 820), ISO 13485, and GMP standards preferred Strong mechanical aptitude with demonstrated ability to solve complex mechanism, assembly, tolerance, material, manufacturing, and system integration problems

Experience with motor integration, torque analysis, mechanism design, drive systems, durability, reliability, DOE, and test method development preferred Significant injection molding experience, including production-intent plastic part design and direct interaction with tooling, molding, or manufacturing partners. Experience with supplier collaboration, first article inspections, process validation support, and production transfer. Experience creating engineering drawings and applying GD&T and tolerance analysis to support robust product performance.

Ability to work independently, influence technical direction, mentor others, and communicate complex technical concepts clearly to technical and non-technical audiences. Anticipated salary range: $94,900 - $135,600 Bonus eligible: No Benefits: Cardinal Health offers a wide variety of benefits and programs to support health and well-being. Medical, dental and vision coverage Paid time off plan Health savings account (HSA) 401k savings plan Access to wages before pay day with myFlexPay Flexible spending accounts (FSAs) Short- and long-term disability coverage Work-Life resources Paid parental leave Healthy lifestyle programs Application window anticipated to close: 8/23/26*if interested in opportunity, please submit application as soon as possible.

The salary range listed is an estimate. Pay at Cardinal Health is determined by multiple factors including, but not limited to, a candidate's geographical location, relevant education, experience and skills and an evaluation of internal pay equity. #LI-JB1 Candidates who are back-to-work, people with disabilities, without a college degree, and Veterans are encouraged to apply.

Cardinal Health supports an inclusive workplace that values diversity of thought, experience and background. We celebrate the power of our differences to create better solutions for our customers by ensuring employees can be their authentic selves each day. Cardinal Health is an Equal Opportunity/Affirmative Action employer.

All qualified applicants will receive consideration for employment without regard to race, religion, color, national origin, ancestry, age, physical or mental disability, sex, sexual orientation, gender identity/expression, pregnancy, veteran status, marital status, creed, status with regard to public assistance, genetic status or any other status protected by federal, state or local law. Apply