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Plastic Mold Assembly Jobs (NOW HIRING)

Plastics Engineer

Hudson, MA · On-site

$110K - $130K/yr

Drive Innovation at a Leader in Custom Injection Molding Since 1968, Plastic Molding Manufacturing ... part joining, and assembly, PMM sets the benchmark for quality, consistency, and technical ...

Plastics Engineer

Hudson, MA · On-site

$110K - $130K/yr

Drive Innovation at a Leader in Custom Injection Molding Since 1968, Plastic Molding Manufacturing ... part joining, and assembly, PMM sets the benchmark for quality, consistency, and technical ...

ABOUT MSI MOLD BUILDERS Since 1971, we have been using the most innovative plastic technologies and ... Your efforts keep our assembly team supported and our manufacturing projects running seamlessly!

ABOUT MSI MOLD BUILDERS Since 1971, we have been using the most innovative plastic technologies and ... Your efforts keep our assembly team supported and our manufacturing projects running seamlessly!

ABOUT MSI MOLD BUILDERS Since 1971, we have been using the most innovative plastic technologies and ... Your efforts keep our assembly team supported and our manufacturing projects running seamlessly!

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Infographic showing various Plastic Mold Assembly job openings in the United States as of July 2026, with employment types broken down into 84% Full Time, 6% Part Time, 8% Contract, and 2% Nights. Highlights an 98% Physical, 1% Hybrid, and 1% Remote job distribution.

Plastic Injection Mold Repair Technician/Mold Maker

Rittman, OH • On-site

J&O Plastics, Inc.
Plastics Product Manufacturing • 11 - 50 employees

Full-time

Posted 12 days ago


Job description

J &O Plastics, a leading manufacturer of quality custom injection molding is a dynamic growing manufacturing company committed to operational excellence.
With a strong focus on innovation, efficiency, and quality products, Our team shows up every day to serve our customers and vendors with focus, ingenuity, and a commitment to quality. Each and every one of our employees is an integral part of our operations, and part of what makes J&O Plastics leaders in precision injection molding. We strive to create an inclusive environment that celebrates our different lived experiences, with the hope of fostering a community atmosphere.
This role is hands-on and responsible for the repair and maintenance of plastic injection molds. The successful candidate should have at least three years of hands on experience and a strong mechanical aptitude. Reporting to the Tooling Manager they will perform grinding, polishing, and precision fitting of die components, and complete mold repairs to restore optimal performance. The technician must accurately document mold repair activities and procedures, while maintaining a strong focus on safety, quality, and continuous improvement.
JOB RESPONSIBILITIES
  • Polishing molds up to a A2 (Grade A) finish
  • Refitting parting lines
  • Plastic injection mold assembly
  • Troubleshoot and repair hot runner systems
  • General machine work:
    • Bridgeport
    • Lathe
    • Surface grinder
  • Welding helpful but not necessary:
    • Tig
    • Mig
    • Laser
  • General maintenance and repairs of plastic injection molds

JOB REQUIREMENTS:
  • High school diploma or equivalent.
  • Three years of mold tooling experience; (willing to train if candidates present strong mechanical background)
  • Ability to use hand tools to adjust equipment.

WORK ENVIRONMENT:
  • Open air tooling department
  • Humidity level may be elevated during summer months.
  • Work closely with maintenance, production, and plant manager.
  • Exposure to loud noise levels, at times