Research and Development Composites Molding Engineer

Re:Build Manufacturing • Commerce City, CO

9d • $92,000 - $137,000 • Onsite

About The Position

Re:Build Manufacturing is seeking a skilled R&D Composites Molding Engineer to lead research and development of advanced thermoplastic molding processes, tooling technologies, and prototype equipment. This hands-on role focuses on developing molding processes, designing prototype tooling, and testing emerging technologies while working directly with molds, molding equipment, and R&D teams. The engineer will independently manage multiple projects from concept through prototype validation and support manufacturing capabilities across Re:Build sites.

The position is primarily based at Re:Build’s Denver facility and combines office and engineering work with hands-on work in an R&D lab and on the shop floor. It includes active participation in prototype builds and testing, with occasional travel to other Re:Build sites or suppliers. The work week is onsite Monday through Friday on a standard day shift.

The base salary range is $92,000–$137,000 per year. The role may also be eligible for annual incentive compensation and/or long-term incentives, subject to company plans. The company offers medical, dental, vision, retirement, paid time off, and other benefits. Employees share ownership in the company and may share in its financial rewards.

Requirements

• Bachelor’s degree in Mechanical Engineering, Materials Engineering, Plastics Engineering, or a related engineering discipline.
• At least 5 years of thermoplastic processing experience, such as thermoforming, injection molding, compression molding, or thermoplastic composites.
• Proficiency in SolidWorks for 3D modeling and tooling design.
• Hands-on experience working with molds and molding equipment.
• Strong understanding of thermoplastic materials and processing parameters.
• Process development and prototyping experience.
• Tooling design and modification experience.
• Ability to troubleshoot complex process and equipment issues.
• Experience managing multiple projects independently.
• Strong problem-solving and communication skills.

Nice To Haves

• At least 10 years of thermoplastic processing experience.
• Experience with multiple thermoplastic processes, such as thermoforming, injection molding, compression molding, and thermoplastic composites.
• Prototype mold design experience.
• Material science or polymer engineering background.
• Experience in R&D or advanced manufacturing environments.
• FEA or simulation analysis experience.
• Experience with emerging composites technologies.

Responsibilities

• Develop and advance thermoplastic molding processes for R&D applications.
• Design prototype tooling and molds using SolidWorks.
• Research and evaluate new tooling technologies and molding methods.
• Provide hands-on support during prototype builds and troubleshoot molds and molding equipment.
• Lead new process development and qualification activities.
• Manage multiple concurrent R&D composites projects independently.
• Test and validate prototype tooling and process parameters.
• Collaborate with engineering and technical staff across Re:Build sites.
• Coordinate with external vendors and suppliers for materials, tooling, and services.
• Document R&D processes, test results, specifications, and best practices.

Benefits

• Medical, dental, and vision benefits.
• Retirement benefits.
• Paid time off.
• Other benefits.
• Potential eligibility for annual incentive compensation and/or long-term incentives, subject to company plans.
• Company ownership and participation in financial rewards.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior