Plastic Engineer Jobs in Boston, MA (NOW HIRING)

Drive Innovation at a Leader in Custom Injection Molding

Since 1968, Plastic Molding Manufacturing (PMM) has been a privately held, owner-operated leader in the custom injection molding industry—trusted to deliver complex, high-precision solutions across critical markets including Medical, Defense, Electronics, Industrial, Transportation, and Consumer products.

Our capabilities go far beyond standard molding. From advanced product development to tight-tolerance, thin- and thick-wall applications, part joining, and assembly, PMM sets the benchmark for quality, consistency, and technical excellence.

With over 100 presses across four state-of-the-art U.S. facilities, we combine scale with deep engineering expertise—making us a go-to partner for customers who require precision, reliability, and performance at the highest level.

Since 1968, Plastic Molding Manufacturing (PMM) has been an owner-operated leader in American-made innovation and quality. We focus on plastics molding development, thin and thick wall molding, tight tolerance molding, part joining and assembly. We proudly serve a number of markets including Industrial, Medical, Electronics, Defense, Transportation and Consumer.

With over 100 presses across our four state-of-the-art facilities in MA, CT, PA, and IN, we’re committed to strengthening U.S manufacturing by delivering exceptional production, employment, and economic opportunities nationwide

• Position: Plastics Engineer (Plastic Injection Molding).
• Location: Hudson, MA (on-site).
• Schedule: Monday to Friday (based on business needs).
• Compensation: $110K - $130K (Dependent on Experience).
• Employment Type: Full-Time.

We are seeking a highly experienced Plastics Engineer to take a lead role in driving process development, technical problem-solving, and new program success within our injection molding operations.

This is a senior, high-impact position where you will own complex projects from concept through production—working directly with customers, tooling partners, and internal teams to deliver optimized, production-ready solutions. Your expertise will directly influence quality, efficiency, and the long-term success of our manufacturing operations.

• Lead development and optimization of injection molding processes for complex, tight-tolerance components.
• Own key customer programs—serving as the primary technical point of contact from design through production.
• Evaluate and approve tooling designs, modifications, and performance.
• Partner with tooling vendors and internal teams to ensure molds are production-ready and performing at peak efficiency.
• Drive continuous improvement initiatives to reduce scrap, improve cycle times, and increase overall process capability.
• Utilize SolidWorks and CAD data to support product development, manufacturability, and quoting.
• Troubleshoot processing and tooling challenges with a hands‑on, solution‑driven approach.
• Collaborate cross‑functionally with manufacturing, quality, and leadership to ensure seamless execution.

• 10+ years of hands‑on experience in plastic injection molding engineering.
• Bachelor’s degree (or higher) in Engineering (Plastics or related field preferred).
• Deep expertise in processing, tooling, materials, and mold design.
• Strong proficiency in SolidWorks, AutoCAD, and ERP systems (IQMS preferred).
• Proven ability to lead projects, solve complex problems, and drive measurable improvements.
• Strong communication skills with the ability to interface directly with customers and vendors.

• Established leader in custom injection molding with over 55 years of technical excellence.
• Advanced manufacturing footprint with significant scale and capability.
• A company that values engineering expertise and empowers decision-making.
• Competitive compensation and comprehensive benefits, including:
  • PTO, holidays, and vacation.
  • Health, dental, and vision insurance (multiple plan options).
  • FSA and 401(k) with company match.
  • Company-paid life insurance, AD&D, and short-term disability.
  • Optional long-term disability coverage.
  • Employee referral bonuses.

• This description is not intended to be all-inclusive. The employee may perform other related duties as negotiated to meet the ongoing needs of the organization.
• Pre-employment background checks are required for all applicants who accept an offer. Offers are contingent upon a report which is acceptable to the company.
• The company provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, gender, sexual orientation, gender identity, national origin, age, disability, genetic information, marital status, amnesty or status as a covered veteran in accordance with applicable federal, state and local laws.