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Certified Laboratories began business around 1948 in Fort Worth, Texas when Jimmy Rosenthal opened a storefront cleaning supply business. He made sales calls and delivered goods during the day, and filled orders and did paperwork at night. As business grew, Jimmy added other sales people, clerks, and warehouse staff to handle a growing business and customer base that reached beyond his home town.

Certified realized that the need for exceptional maintenance products and good service was universal. In the 1960s, an international business was launched in the United Kingdom, using the successful sales model that grew the business in the U.S.

By the late 1960s and early 1970s, Certified opened sales offices and manufacturing facilities throughout the US, Canada, Europe, and Latin America. In the 1980s, Certified representatives were hired in Asia, along with the opening of strategic manufacturing facilities.

Today, Certified is a major supplier of specialty maintenance products for businesses large and small. Aside from major oil-producing companies, Certified is one of the largest manufacturers and suppliers of lubrication products in the world.


As a Certified sales representative, the sky’s the limit. You can be your own boss and set your own schedule. Enjoy unlimited earning potential, with the added security of a base, plus bonus, while you are building your repeat customer base.

Certified gives sales representatives all the tools necessary for a rewarding, high-performance career. Specific tools include time, money, understanding, support, and more. Plus, your defined territory will be filled with repeat business because you’re offering high-quality products that your customers must use, as well as providing value-added services they want.


Certified Laboratories
239 Orenda Road
Brampton, ON L6T 1E6