Mold Design Engineer

HDI, Inc.; Cidra (PR); On-site; USD 70,000 - 110,000; Full time

Job summary

HDI, Inc. is seeking a Mold Design Engineer to design molds, tooling, fixtures, and related components using 3D and 2D CAD software. You will support customer projects from concept through final design, manufacturing, sampling, and tool approval.

The role requires mold design experience with injection, compression, or thermoset tooling preferred, along with strong CAD skills and GD&T knowledge. Collaboration with customers, vendors, and internal teams is essential for successful tool

Qualifications

• Must have mold design experience.
• Experience with injection, compression, or thermoset tooling preferred.
• CAD experience required.
• Degree or equivalent experience in mechanical engineering or tooling.

Responsibilities

• Design molds, tooling, fixtures, and related components.
• Review customer part models, prints, and specs.
• Participate in DFM reviews to identify manufacturability issues.
• Create complete mold designs, assemblies, BOMs.
• Support tool builds and resolve design issues with shop.
• Communicate with customers, vendors, sales, and management.
• Maintain design documentation and revision control.
• Lead design reviews and communicate risks.

Skills

CAD proficiency

GD&T reading

Problem solving

Communication

Organization

Education

Mechanical engineering degree

Mold design experience accepted in lieu of degree

Tools

3D CAD

2D CAD

Mold design software

Job description

The Mold Design Engineer is responsible for designing molds, tooling, fixtures, and related components using 3D and 2D CAD software. This position supports customer projects from concept through final design, manufacturing, sampling, and tool approval.

Primary responsibilities include:

• Design injection molds, compression molds, transfer molds, fixtures, and tooling components.
• Review customer part models, prints, and specifications.
• Participate in DFM reviews and identify manufacturability concerns.
• Apply proper shrink, draft, parting lines, gate locations, venting, cooling, ejection, and mold construction methods.
• Create complete mold designs, assemblies, details, and bills of material.
• Support tool builds by answering shop questions and resolving design issues.
• Communicate with customers, vendors, sales, production, and management.
• Maintain design documentation and revision control.
• Support mold sampling, troubleshooting, and continuous improvement.

Leadership Responsibilities

• Provide technical direction on mold design and tooling questions.
• Support design standards and best practices.
• Assist with training less-experienced designers or engineers.
• Help lead design reviews and communicate technical risks clearly.

Job Requirements

Education

• Degree in mechanical engineering, tool design, manufacturing engineering, or equivalent work experience preferred.
• Mold design experience may be accepted in place of formal education.

Experience

• Mold design experience required.
• Experience with injection molding, compression molding, or thermoset tooling preferred.
• CAD experience required.

Knowledge, Skills & Abilities

• Strong knowledge of mold construction and molding principles.
• Proficiency in 3D and 2D CAD.
• Ability to read customer part prints and understand GD&T.
• Knowledge of plastic materials, shrink, venting, cooling, ejection, and gating.
• Strong problem-solving and communication skills.
• Strong organizational skills and ability to manage multiple projects.

Physical Requirements

• Must be able to sit and work at a computer for extended periods.
• Must be able to walk through shop and production areas.
• Must be able to lift up to 50 lbs. occasionally.
• Must be able to safely work around molds, machines, and production equipment.

Travel

• Occasional customer, vendor, or supplier visits may be required.