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Internship – Plastic Injection Molding: (Technician/Engineer/Sales/Account Manager)

CROWN Manufacturing – Newark, CA

About Us

CROWN Manufacturing is a leading plastic injection molding company that specializes in low volume high-precision parts, medical components, etc… We offer a dynamic and fast-paced work environment for individuals who are passionate about manufacturing, product development, and innovation.

Internship Program

Our internship program provides an opportunity for highly motivated students to gain valuable hands-on experience in the exciting world of plastic injection molding. You will work alongside experienced professionals and wear many hats for exposure as a Technician, Engineer, Sales, or Account Manager to gain a comprehensive understanding of the entire injection molding process, from design to production.

Areas of Immersion:


  • Responsibilities:
    • Assist with machine setup and operation under the supervision of experienced technicians.
    • Perform basic maintenance tasks on injection molding equipment.
    • Conduct quality control inspections on finished parts.
    • Collect and record production data.
    • Learn about mold maintenance and repair procedures.
  • Qualifications:
    • Currently enrolled in a technical program or engineering program (Associates or Bachelors degree).
    • Strong attention to detail and a commitment to quality.
    • Ability to work effectively in a team environment.
    • Basic understanding of mechanical principles is a plus.


  • Responsibilities:
    • Assist engineers with design reviews and project development.
    • Learn about mold design principles and software (e.g., CAD).
    • Conduct material research and analysis.
    • Support process optimization and troubleshooting efforts.
    • Gain exposure to quality control procedures and certifications (ISO, etc.).
  • Qualifications:
    • Currently enrolled in a mechanical engineering or related program (Bachelors degree preferred).
    • Strong analytical and problem-solving skills.
    • Proficient in using engineering software (CAD is a plus).
    • Excellent communication and interpersonal skills.

Sales/Account Management

  • Responsibilities:
    • Assist the sales team with research and lead generation.
    • Learn about plastic injection molding capabilities and applications.
    • Prepare quotes and proposals for potential customers.
    • Attend customer meetings and shadow sales representatives.
    • Gain experience with customer relationship management (CRM) software.
  • Qualifications:
    • Currently enrolled in a business administration or marketing program (Bachelors degree preferred).
    • Strong communication and interpersonal skills.
    • Excellent written and verbal presentation skills.
    • Highly organized and detail-oriented.
    • Proficient in using business software (CRM, MS Office Suite).


This internship is a paid position and offers the opportunity to gain valuable experience in a growing industry. You will also have the chance to network with industry professionals and learn from experienced mentors.

To Apply

Please submit your resume to Be sure to specify which area of the internship (Technician, Engineer, Sales, or Account Management) you are most interested in.

We look forward to hearing from you!