Service Technician (Windows & Doors)
CornerstoneBuildingBrandsCareers
Posted: May 11, 2026
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Quick Summary
We are seeking a skilled Service Technician to join our team in St. Thomas, ON, to maintain and repair exterior building products for residential and low-rise non-residential buildings in North America. Key skills required include knowledge of building codes and regulations, and experience with exterior building products.
Required Skills
Job Description
Cornerstone Building Brands is a leading manufacturer of exterior building products for residential and low-rise non-residential buildings in North America. Headquartered in Cary, N.C., we serve residential and commercial customers across the new construction and Repair & Remodel (R&R) markets. Our market-leading portfolio of products spans vinyl windows, vinyl siding, stone veneer, metal roofing, metal wall systems and metal accessories. Cornerstone Building Brands’ broad, multi-channel distribution platform and expansive national footprint includes more than 18,800 team members at manufacturing, distribution and office locations throughout North America. Corporate stewardship and Environmental, Social and Governance (ESG) responsibility are embedded in our culture. We are committed to contributing positively to the communities where we live, work and play. For more information, visit us at http://cornerstonebuildingbrands.com.
North Star Windows & Doors is a growing company in the building products industry backed by Cornerstone Building Brands, providing us with stability and strength in the North American market.  Cornerstone Building Brands is the largest manufacturer of vinyl windows in North America with brands you’ve come to know and trust. We have endless building product options from standard to specialty to customized to whatever you’re looking for. But it’s our service capabilities that sets us apart.  
This role is responsible for completing assigned warranty-related service work for North Star Windows and Doors, under the direction of the Service Operations Manager. The successful candidate will be an experienced and reliable service technician who can work independently, travel occasionally, and professionally represent the company while servicing windows and doors.
The position requires strong technical knowledge of home construction, excellent customer communication skills, and the ability to consistently meet deadlines. A valid driver’s license and flexibility to work varied hours are also required.
• Ability to work flexible hours
• Strong attendance and punctuality record
• Reliable, trustworthy, responsible, and safety-conscious
• Minimum 2 years of experience installing or servicing windows, patio doors, and entry doors
• Knowledge of North Star products is considered an asset
• Ability to travel occasionally, including overnight trips
• Strong English reading and writing skills, with the ability to complete service documentation accurately
• Professional and positive representation of North Star, with the ability to communicate calmly and courteously with customers
• Ability to work independently and manage pressure while meeting deadlines
• Strong knowledge of current home construction technology, products, and practices
• Valid Class G driver’s license
Pay: $25-30/HR plus bonus and benefits
This opening is an existing vacancy.   
Cornerstone Building Brands Canada is committed to an inclusive, equitable and accessible workplace. We encourage applications from all qualified candidates, including those with disabilities. We will accommodate applicants’ needs, upon request, throughout all stages of the recruitment process. Please inform us of the accommodation(s) that you may require. Information received relating to accommodation will be addressed confidentially.