In 1940, John J. Tennier opened Tennier Manufacturing Company in Hamilton, specializing in cleaning products and sweeping compounds. Over the next 35 years, the Tenniers built the leading cleaning supplies company in Southern Ontario, providing janitorial and sanitation supplies and equipment to some of the most well-known businesses, stores and manufacturing facilities in the area.

Almost 80 years later, Tennier is still recognized as the company to call for commercial, industrial and manufacturing cleaning solutions. And while we value our long history, and the decades-long relationships we’ve built with our clients, customers, employees and suppliers, we’re always looking toward the future.


With more than 500 clients and customers across Southern Ontario, from offices and clinics to retail chains and manufacturing facilities, businesses call us when they need cleaning and janitorial products, industrial absorbents, and cleaning equipment – and want the process to be reliable, easy and seamless.


Darren Slemko, President & CEO

Deep roots in the Hamilton area and a history of transforming organizations with smart strategic and financial management made Darren a perfect fit with Tennier, which he purchased in 2018. Committed to respecting Tennier’s history of high-touch service to clients, he’s also leading innovations that will allow us to deliver even better janitorial and sanitation solutions.

Paul Regan, General Manager
As a part of Tennier for almost 35 years, Paul is the backbone of our operations and client management. He’s the one who ensures that our KeepFull System really does deliver the right products at the right time to our clients – and that they don’t have to worry about their cleaning and janitorial supplies.

Kim Baylis, Sales Representative
Part of the sales team for more than 36 years, Kim is passionate about finding smart, cost-effective solutions that help our clients get the most out of their cleaning, janitorial and absorbent products. As a member of Hamilton’s CAER (Community Awareness & Emergency Response) Group, Kim gives back to the community by helping to reduce the risk of emergency situations.

David Seguin, Sales Representative
With more than 30 years of experience in health & safety and training, and a member of the Canadian Society of Safety Engineering, David joined Tennier in 2012 with a particular focus on helping organizations meet their health and safety goals with best-in-class sanitation, janitorial and absorbent supplies.

Tennier Sanitation's Tommy Baxter

Tommy Baxter, Sales Representative
Tommy’s 35 years of experience in sanitation, chemical and systems sales is just one of the reasons he’s been one of Tennier’s most trusted salespeople for so long. His depth of knowledge about cleaning products and systems makes him a trusted advisor to many of our clients.