Sentinel Expands to Quebec with Door Doctor Deal
Sentinel Dock & Door Solutions, a leading Canadian network of dock and door service providers backed by Trivest Partners (“Trivest”), has announced the strategic acquisition of Door Doctor, a premier dock and door services provider headquartered in Montreal, Quebec. This move marks Sentinel’s official entry into the Quebec market and expands its presence in Eastern Ontario, bolstering its status as a national leader in the commercial dock and door sector.
Door Doctor, founded and led by President Gordon Lazare and his long-time business partner Andrew Selinsky, Vice President of Sales & Marketing, has become a dominant force in Quebec’s commercial dock and door services industry. The company operates multiple service locations in Montreal, Kingston, Ottawa, and Toronto. Door Doctor specializes in the installation, maintenance, and repair of overhead doors, loading docks, dock levelers, and related equipment. Its ability to serve a broad customer base across varied regions has made it a trusted name in the industry.
“We are excited to welcome Door Doctor to the Sentinel platform,” said Travis Allan, CEO of Sentinel Dock & Door Solutions. “Door Doctor is a highly respected brand with a long-standing reputation for customer service and technical excellence. This partnership is instrumental to our strategic expansion into Quebec and will play a key role in our ongoing national growth.”
The acquisition is a transformative step for Sentinel. By adding Door Doctor to its portfolio, Sentinel significantly extends its operational footprint and service capabilities across Eastern Canada. Door Doctor will maintain its well-established brand identity while gaining access to Sentinel’s strategic resources, operational expertise, and wide-reaching industry relationships. This combination is expected to enhance service delivery and accelerate overall growth for both organizations.
Gordon Lazare, President of Door Doctor, shared his enthusiasm about the acquisition: “Joining Sentinel represents a significant milestone for our company. We are deeply aligned in our commitment to superior customer service and operational integrity. This partnership allows us to strengthen our services and grow at an accelerated pace across Quebec and Ontario.”
Echoing this sentiment, Andrew Selinsky, Vice President of Sales & Marketing at Door Doctor, commented, “I’m thrilled to continue our 42-year journey with the support of Sentinel. This partnership marks a pivotal point for Door Doctor. With Sentinel’s backing, we are now poised to contribute to building a national platform that can transform the dock and door services industry in Canada.”
Door Doctor’s leadership and team will remain in place to ensure business continuity and preserve the strong relationships they have cultivated with clients over decades. The company will benefit from access to Sentinel’s larger network, shared best practices, and growth-oriented operational strategies.
The acquisition aligns with Sentinel’s broader mission to develop a premier Canadian network of dock and door service providers. As part of its ongoing strategy, Sentinel is actively seeking additional partnerships with high-quality companies across the country. The goal is to offer strategic support that enhances growth and innovation while preserving each partner’s legacy and commitment to customer satisfaction.
About Door Doctor
Headquartered in Montreal, Quebec, Door Doctor is a well-established provider of commercial dock and door services with additional locations in Kingston, Ottawa, and Toronto. The company offers expert installation, repair, and maintenance services for a range of equipment including overhead doors, loading docks, and dock levelers. Renowned for its technical proficiency and customer-first approach, Door Doctor supports a diverse commercial and industrial clientele throughout Quebec and Ontario.
About Sentinel Dock & Door Solutions
Sentinel Dock & Door Solutions is a Canadian acquisition platform focused on creating a premier network of commercial dock and door service providers. With support from Trivest Partners, Sentinel works with top-tier operators to drive business growth, operational efficiency, and market expansion. Sentinel’s model emphasizes preserving the legacy and brand value of each acquired company. The platform was formed through the combination of Lenworth, Pro Door, Mar-Lin, and Door Doctor, and continues to grow through targeted acquisitions.
About Trivest Partners
Trivest Partners is a leading private equity firm specializing in investments in founder-led and family-owned businesses. With both control and non-control investment strategies, Trivest supports entrepreneurial growth across North America. Headquartered in Miami and operating offices in Charlotte, Chicago, Los Angeles, New York, and Toronto, Trivest manages four distinct investment funds and works with over 50 portfolio companies as of January 2025. Trivest is recognized for its collaborative approach, long-term partnerships, and commitment to helping companies scale sustainably.
