Sr. Process Engineer

PTA Plastics; Oxford (CT); On-site; USD 120,000 - 135,000; Full time

Benefits offered by this job

Equal employment opportunities

Collaborative work environment

Opportunity for career development

Job summary

PTA Plastics in Oxford, CT, is seeking a Senior Process Engineer to improve injection molding processes. You will optimize cost, quality, and throughput while collaborating with quality teams and leading process validation activities.

This role requires significant experience in plastics manufacturing and strong knowledge of scientific molding techniques. Join a company committed to innovation, where every team member has a stake in success.

Qualifications

• 8+ years of hands-on process engineering experience in plastics manufacturing.
• Experience with ISO 13485 or similar regulated industry quality systems.
• Proven ability to troubleshoot molding processes and optimize process controls.

Responsibilities

• Develop and optimize injection molding processes for molds.
• Troubleshoot molding processes, tooling, and automation issues.
• Document and maintain process sheets and validation documentation.

Skills

Injection molding expertise

Scientific molding principles

Lean Manufacturing

Six Sigma

CAD software

Education

Bachelor's degree in Engineering

Tools

Moldflow

RJG/eDART

Job description

Posted Tuesday, June 16, 2026 at 4:00 AM

Company Overview

PTA Plastics, an employee‑owned and innovative leader in the plastic injection molding, contract manufacturing and tool‑building industry, is looking for a Senior Process Engineer to join our dynamic team.

At PTA Plastics, we’re more than just a manufacturer; we partner with Fortune 500 OEMs in the medical device, defense, homeland security, and technology sectors, constantly pushing the boundaries of product development and manufacturing excellence. As an employee‑owned company, every team member has a stake in our success, creating a collaborative and entrepreneurial environment where innovation thrives.

Job Summary

The Senior Process Engineer plays a vital role in the injection molding team by creating, analyzing, improving, and adjusting molding processes to optimize cost, quality, and throughput of the molding operations. The Molding Process Engineer will be responsible for sampling, process development, and documentation of new injection molds as well as existing molds; in addition to mold validation and sampling.

Pay: $120,000 - $135,000 annually

• Develop and optimize injection molding processes for new and existing molds using scientific molding principles.
• Lead mold sampling, process development, validation activities, and production launches.
• Work with Quality to establish and maintain consistent part quality, process controls, and monitoring systems.
• Troubleshoot molding processes, tooling, materials, automation, and equipment issues.
• Collect and analyze process data to identify opportunities to improve quality, efficiency, cycle time, and process capability.
• Document and maintain process sheets, setup standards, work instructions, and validation documentation.
• Assist with the creation and maintenance of Control Plans, PFMEAs, process flows, and related manufacturing documentation.
• Participate in mold design reviews, material reviews, and formal print reviews.
• Provide input on mold, tooling, automation, and equipment designs to ensure alignment with process requirements and manufacturing objectives.
• Develop and execute Design of Experiments (DOE), capability studies, and process validations for new and modified processes.
• Provide technical leadership and support for cost reduction, scrap reduction, cycle time improvement, and continuous improvement initiatives.
• Work with Operations, Tooling, Maintenance, Engineering, and Quality to develop, strengthen, and maintain troubleshooting and process improvement activities.
• Serve as a technical resource for resolving molding defects, dimensional issues, and process‑related production challenges.
• Mentor and train Process Technicians, Setup Technicians, and Operations personnel on scientific molding and process control practices.
• Use Lean Manufacturing, Six Sigma (DMAIC), SPC, DOE, and other statistical tools to analyze process performance and drive continuous improvement.
• Support KPI tracking and reporting related to scrap, efficiency, downtime, OEE, cycle time, and process capability.
• Other duties as assigned.

Qualifications & Requirements

• Bachelor's degree in Engineering (Manufacturing, Mechanical, Plastics, Industrial) and
• 8+ years of hands‑on process engineering experience in plastics manufacturing, with strong injection molding expertise
• 5+ years of experience with ISO 13485 or similar regulated industry quality system requirements preferred
• Demonstrated experience developing, documenting, optimizing, and troubleshooting injection molding processes in a production environment.
• Strong knowledge of scientific molding, decoupled molding, process window development, tooling, resins, drying requirements, and secondary operations.
• Experience with mold sampling, process validation, capability studies, root cause analysis, corrective/preventive actions (CAPA), and MRB support.
• Experience using Computer Aided Design (CAD) software; experience with Moldflow, RJG/eDART, cavity pressure monitoring, or similar tools is preferred.
• Working knowledge of Lean Manufacturing, Six Sigma, DOE, SPC, GD&T, PFMEA, control plans, ERP/MES systems, and data analysis tools.
• Strong communication, leadership, mentoring, problem‑solving, and project management skills with the ability to influence cross‑functional teams.
• Experience in writing, reading and interpreting the documentation of designs and production processes.

Physical Requirements

• Ability to stand, walk, and move around the production floor for extended periods.
• Capable of lifting and carrying heavy objects weighing up to 50 pounds.
• Manual dexterity and hand‑eye coordination for handling small tools, machine components, and molds.
• Ability to work in a fast‑paced environment and adapt to changing priorities.
• Comfortable wearing personal protective equipment (PPE) such as safety glasses, gloves, and ear protection.
• Occasional bending, kneeling, and reaching to access equipment and perform maintenance tasks.
• Good vision and color perception for inspecting parts and identifying any defects or abnormalities.
• Ability to work in temperature‑controlled environments and withstand exposure to noise levels associated with manufacturing machinery.
• Ability to receive, comprehend and utilize required training from OSHA and Company including but not limited to the following:

Equal Employment Opportunity & ADA Compliance Statement

PTA Plastics is committed to providing equal employment opportunities to all individuals, including those with disabilities. As part of this commitment, PTA Plastics complies with the Americans with Disabilities Act (ADA) and Connecticut’s Fair Employment Practices Act (CFEPA), which prohibit discrimination against individuals with disabilities in hiring, job assignments, promotions, compensation, benefits, training, and other aspects of employment.

If you require a reasonable accommodation to participate in the application or interview process or to perform the essential functions of this position, please contact [e-mail] . Reasonable accommodations will be provided in accordance with applicable laws to enable individuals with disabilities to perform essential job duties.

This job description is intended to describe the general nature and level of work being performed. It is not an exhaustive list of all responsibilities, duties, and skills required. Employees may be required to perform other duties as assigned.