Product Engineer Intern

ABOUT THE ROLE

This internship is for Summer 2026.

The Product Engineering Intern will support the Product Engineering Team in developing innovative problem-solving solutions for the building industry. This internship offers a unique opportunity to gain hands-on experience with window and door products while contributing to projects focused on new product development product improvements and cost-savings initiatives.

As an intern you will work alongside experienced engineers gaining exposure to design testing and manufacturing processes. This role provides meaningful real-world project experience along with visibility across the organization. Professional growth and learning opportunities are strongly encouraged and supported throughout the internship.

WHAT YOULL DO

• Assist in the design prototyping and testing of new products.
• Support engineers in analyzing current products and maintaining specifications.
• Participate in reviewing and researching new product concepts to determine feasibility.
• Help ensure products meet industry certification program standards (AAMA WDMA NAMI CSA NFRC IGMA).
• Prepare and update drawings schematics and technical documentation under engineer guidance.
• Assist with Engineering Change Orders and Non-Standard Product Requests.
• Participate in cross-functional meetings with engineering manufacturing and other business teams.
• Gain exposure to manufacturing environments by supporting new product launches audits and production troubleshooting.
• Support voice-of-customer activities and continuous improvement (kaizen) exercises.
• Accompany engineers on site visits to observe field testing customer service activities or installation practices.

Qualifications :

WHAT YOULL NEED

• Pursuing a bachelors degree in Mechanical or Industrial Engineering or higher.
• 2D drafting and 3D modeling experience preferred.

Additional Information :

WHAT YOULL GET

• Competitive pay
• Inclusive collaborative environment
• Bragging rights youll work for the market leader in multiple product categories
• Professional development opportunities
• Intern buddy

Why work for Cornerstone Building Brands 

Our teams are at the heart of our purpose to positively contribute to the communities where we live work and play. Full-time* team members receive** medical dental and vision benefits starting day 1. Other benefits include PTO paid holidays FSA life insurance LTD STD 401k EAP discount programs tuition reimbursement training and professional development. 

*Full-time is defined as regularly working 30 hours per week. **Union programs may vary depending on the collective bargaining agreement.

Cornerstone Building Brands is an Equal Opportunity Employer. 

All qualified applicants will receive consideration for employment without regard to race color religion sex sexual orientation gender identity national origin age pregnancy genetic information disability or status as a protected veteran. You can find the Equal Employment Opportunity Poster here. You can also view Your Right to Work Poster here along with This Organizations Participation in E-Verify Poster here. If youd like to view a copy of the companys affirmative action plan for protected veterans or individuals with disabilities or policy statement please contact Human Resources at or If you have a disability and you believe that you need a reasonable accommodation in order to search for a job opening or to submit an online application please contact Human Resources at or This email is used exclusively to assist disabled job seekers whose disability prevents them from being able to apply online. Only emails received for this purpose will be returned. Messages left for other purposes such as following up on an application or technical issues not related to a disability will not receive a response.

All your information will be kept confidential according to EEO guidelines.

California Consumer Privacy Act (CCPA) of 2018

Must be at least 18 years of age to apply.

Notice of Recruitment Fraud

We have been made aware of multiple scams whereby unauthorized individuals are using Cornerstone Building Brands name and logo to solicit potential job-seekers for some cases job-seekers are being contacted directly both by phone and other instances these unauthorized individuals are placing advertisements for fake positions with both legitimate websites and fabricated ones. These individuals are typically promising high-paying jobs with the requirement that the job-seeker send money to pay for things such as visa applications or processing fees. Please be advised that Cornerstone Building Brands will never ask potential job-seekers for any sort of advance payment or bank account information as part of the recruiting or hiring process.

Remote Work :

No

Employment Type :

Intern