Careers

Located in Bristol, Rhode Island for 50 years, Tri-Mack Plastics Manufacturing Corporation is a leading manufacturer of high-temperature thermoplastic and metal components for the aerospace-defense, semiconductor, energy and medical industries. Our broad capabilities include collaborative engineering, tool making, injection molding, thermoplastic composite processing, multi-axis CNC machining, bonding and assembly, testing and quality control - all within a modern, environmentally controlled 60,000 sq. ft. facility. Our culture is based on values that promote respect, teamwork and accountability and we are committed to meeting customer requirements through our ISO 9001/AS9100 quality management system. 

PLEASE NOTE - Applicants must be authorized to work for any employer in the U.S. We are unable to sponsor or take over sponsorship of an employment visa at this time.

Summary

We are seeking an experienced Process Engineer specializing in Injection Molding to support the development and production of high-performance plastic components. This role involves establishing, optimizing, and maintaining injection molding processes all while conforming to Tri-Mack quality and customer specifications.

• Design, develop, and validate robust and repeatable injection molding processes for injection molding department.
• Work with Production Support, New Product Introduction (NPI) and Process Improvement (IMP) engineering groups to perform process optimization using manufacturing process sheets and scientific molding. 
• Establish and maintain scientific molding parameters to ensure consistency, precision, and traceability; Monitor cycle times, scrap rates, and material usage.
• Collaborate with tooling, materials, and quality teams to ensure designs meet dimensional and performance requirements under AS9100 standards.
• Conduct root cause analysis and troubleshoot process issues (e.g., porosity, flash, short shots, burn marks).
• Implement process improvements to increase yield, reduce cycle times, and optimize part quality while meeting Tri-Mack standards.
• Interface with customers and internal stakeholders during technical reviews, audits, and qualification runs.
• Collaborate with the Injection Molding Supervisor to implement production process improvements.
• Provide daily technical support to resolve molding-related issues.
• Participate in daily MRB meetings to address non-conforming products.
• Drive cost-reduction efforts through material usage optimization and cycle time reduction.
• Support preventive maintenance activities for molds and related tooling.
• Evaluate mold performance and recommend repair or replacement strategies.
• Assist in the specification and procurement of new injection molding machines and auxiliary equipment.
• Generate technical reports on process performance, trial outcomes, and validations.
• Monitor safety continuously to ensure the safety of yourself as well as your co-workers.
• Adhere to all ISO 9001 and AS9100 requirements.
• Conduct yourself in an ethical and professional manner and always follow Tri-Mack Values:  Respect, Teamwork, Integrity, Accountability and Durability.
• Assist with special projects and other duties as assigned.