General Motors of Canada
Polymer Manufacturing Engineer
General Motors of Canada, Warren, Michigan, United States, 48091
Job Description
Hybrid
This position does not require full-time on-site presence. However, the general expectation is that the employee will be on-site approximately three (3) days per week.
The Role We’re seeking a Polymer Manufacturing Engineer to lead Design for Manufacturing (DFM) efforts across major engineering projects. This role focuses on part design, injection molding, resin selection, cost optimization, equipment, supplier management, and manufacturing processes. Operating in a centralized engineering environment, you’ll apply creativity and initiative to drive quality and efficiency. You’ll collaborate with cross‑functional teams and suppliers to develop thermoplastic parts and molds that meet high standards for quality and performance, supporting the Production Part Approval Process (PPAP).
Responsibilities
Lead suppliers in developing optimized molding processes that produce high‑quality parts with reduced cycle times.
Create and manage tool concept sheets for critical plastic parts and molds, integrating them into cost estimation workflows.
Validate tooling through closed‑loop feedback and standardized manufacturing engineering practices.
Continuously improve mold tooling and manufacturing processes with Tier I suppliers and internal teams, aligning with GM global standards.
Support Strategic Tooling Initiatives (STI) to deliver high‑value solutions in collaboration with suppliers.
Establish transparent workflows between tool concept inputs and cost outputs.
Develop and train others on best practices for injection‑molded parts.
Partner with Product Engineering teams to implement effective design and manufacturing strategies.
Apply expertise in Class‑A surface appearance requirements for molded, painted, chromed, or metalized automotive parts.
Formulate cost‑effective, high‑quality solutions by optimizing part design, tooling, and processing variables.
Collaborate globally to develop plastic part and tool designs that meet cost and quality goals.
Use mold filling analysis software to deliver design solutions that reduce mold debug time and improve part quality.
Required Qualifications
Hands‑on experience with plastic processing and/or tooling.
Proficiency in Unigraphics NX or equivalent CAD software.
Familiarity with injection mold filling analysis tools such as Autodesk Moldflow.
Bachelor’s degree in Plastics Engineering, Mechanical Engineering, Manufacturing Engineering, or a closely related field.
Preferred Qualifications
5+ years of experience in plastic processing and/or tooling.
MS in Plastics or Mechanical Engineering and/or MBA.
Autodesk Moldflow Associate or Professional Certification.
Design for Six Sigma Green or Black Belt Certification.
Background in scientific molding and process control (e.g., RJG).
Experience with statistical techniques such as Six Sigma.
Proficiency in formal problem‑solving methods such as Shainin and/or Design of Experiment (DOE).
Multilingual communication skills (Spanish, Portuguese, German, Korean, and/or Chinese).
This job may be eligible for relocation benefits.
GM DOES NOT PROVIDE IMMIGRATION‑RELATED SPONSORSHIP FOR THIS ROLE. DO NOT APPLY FOR THIS ROLE IF YOU WILL NEED GM IMMIGRATION SPONSORSHIP NOW OR IN THE FUTURE. THIS INCLUDES DIRECT COMPANY SPONSORSHIP, ENTRY OF GM AS THE IMMIGRATION EMPLOYER OF RECORD ON A GOVERNMENT FORM, AND ANY WORK AUTHORIZATION REQUIRING A WRITTEN SUBMISSION OR OTHER IMMIGRATION SUPPORT FROM THE COMPANY (e.g., H‑1B, OPT, STEM OPT, CPT, TN, J‑1, ETC.).
Non‑Discrimination and Equal Employment Opportunities (U.S.) General Motors is committed to being a workplace that is not only free of unlawful discrimination, but one that genuinely fosters inclusion and belonging. We strongly believe that providing an inclusive workplace creates an environment in which our employees can thrive and develop better products for our customers.
All employment decisions are made on a non‑discriminatory basis without regard to sex, race, color, national origin, citizenship status, religion, age, disability, pregnancy or maternity status, sexual orientation, gender identity, status as a veteran or protected veteran, or any other similarly protected status in accordance with federal, state and local laws.
We encourage interested candidates to review the key responsibilities and qualifications for each role and apply for any positions that match their skills and capabilities. Applicants in the recruitment process may be required, where applicable, to successfully complete role‑related assessments and/or a pre‑employment screening prior to beginning employment. To learn more, visit
How we Hire .
Accommodations General Motors offers opportunities to all job seekers including individuals with disabilities. If you need a reasonable accommodation to assist with your job search or application for employment, email us or call us at 800‑865‑7580. In your email, please include a description of the specific accommodation you are requesting as well as the job title and requisition number of the position for which you are applying.
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The Role We’re seeking a Polymer Manufacturing Engineer to lead Design for Manufacturing (DFM) efforts across major engineering projects. This role focuses on part design, injection molding, resin selection, cost optimization, equipment, supplier management, and manufacturing processes. Operating in a centralized engineering environment, you’ll apply creativity and initiative to drive quality and efficiency. You’ll collaborate with cross‑functional teams and suppliers to develop thermoplastic parts and molds that meet high standards for quality and performance, supporting the Production Part Approval Process (PPAP).
Responsibilities
Lead suppliers in developing optimized molding processes that produce high‑quality parts with reduced cycle times.
Create and manage tool concept sheets for critical plastic parts and molds, integrating them into cost estimation workflows.
Validate tooling through closed‑loop feedback and standardized manufacturing engineering practices.
Continuously improve mold tooling and manufacturing processes with Tier I suppliers and internal teams, aligning with GM global standards.
Support Strategic Tooling Initiatives (STI) to deliver high‑value solutions in collaboration with suppliers.
Establish transparent workflows between tool concept inputs and cost outputs.
Develop and train others on best practices for injection‑molded parts.
Partner with Product Engineering teams to implement effective design and manufacturing strategies.
Apply expertise in Class‑A surface appearance requirements for molded, painted, chromed, or metalized automotive parts.
Formulate cost‑effective, high‑quality solutions by optimizing part design, tooling, and processing variables.
Collaborate globally to develop plastic part and tool designs that meet cost and quality goals.
Use mold filling analysis software to deliver design solutions that reduce mold debug time and improve part quality.
Required Qualifications
Hands‑on experience with plastic processing and/or tooling.
Proficiency in Unigraphics NX or equivalent CAD software.
Familiarity with injection mold filling analysis tools such as Autodesk Moldflow.
Bachelor’s degree in Plastics Engineering, Mechanical Engineering, Manufacturing Engineering, or a closely related field.
Preferred Qualifications
5+ years of experience in plastic processing and/or tooling.
MS in Plastics or Mechanical Engineering and/or MBA.
Autodesk Moldflow Associate or Professional Certification.
Design for Six Sigma Green or Black Belt Certification.
Background in scientific molding and process control (e.g., RJG).
Experience with statistical techniques such as Six Sigma.
Proficiency in formal problem‑solving methods such as Shainin and/or Design of Experiment (DOE).
Multilingual communication skills (Spanish, Portuguese, German, Korean, and/or Chinese).
This job may be eligible for relocation benefits.
GM DOES NOT PROVIDE IMMIGRATION‑RELATED SPONSORSHIP FOR THIS ROLE. DO NOT APPLY FOR THIS ROLE IF YOU WILL NEED GM IMMIGRATION SPONSORSHIP NOW OR IN THE FUTURE. THIS INCLUDES DIRECT COMPANY SPONSORSHIP, ENTRY OF GM AS THE IMMIGRATION EMPLOYER OF RECORD ON A GOVERNMENT FORM, AND ANY WORK AUTHORIZATION REQUIRING A WRITTEN SUBMISSION OR OTHER IMMIGRATION SUPPORT FROM THE COMPANY (e.g., H‑1B, OPT, STEM OPT, CPT, TN, J‑1, ETC.).
Non‑Discrimination and Equal Employment Opportunities (U.S.) General Motors is committed to being a workplace that is not only free of unlawful discrimination, but one that genuinely fosters inclusion and belonging. We strongly believe that providing an inclusive workplace creates an environment in which our employees can thrive and develop better products for our customers.
All employment decisions are made on a non‑discriminatory basis without regard to sex, race, color, national origin, citizenship status, religion, age, disability, pregnancy or maternity status, sexual orientation, gender identity, status as a veteran or protected veteran, or any other similarly protected status in accordance with federal, state and local laws.
We encourage interested candidates to review the key responsibilities and qualifications for each role and apply for any positions that match their skills and capabilities. Applicants in the recruitment process may be required, where applicable, to successfully complete role‑related assessments and/or a pre‑employment screening prior to beginning employment. To learn more, visit
How we Hire .
Accommodations General Motors offers opportunities to all job seekers including individuals with disabilities. If you need a reasonable accommodation to assist with your job search or application for employment, email us or call us at 800‑865‑7580. In your email, please include a description of the specific accommodation you are requesting as well as the job title and requisition number of the position for which you are applying.
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