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Black & MCDonald


Roberts Onsite


Roberts Onsite is one of the largest, most respected multi-trade contractors in Ontario. Since 1938, we have met the needs of a broad range of markets and industries.

Our workforce consists of several hundred of the most talented and experienced skilled trades people in the industry, supported by a professional team of project managers, estimators and administrative staff.

From pre-qualifying through to completion, Roberts Onsite provides planning, budgeting, safety coordination, project management, multi-trade construction and maintenance support--all the trades and services you need to meet the requirements and specifications of your process-driven, building-related or energy installation project.

We operate 24 hours a day, seven days a week. Our priority is your project safely completed on time.

We are proud to be part of the Black & McDonald family.




Black & McDonald's depth of experience has made us the partner of choice across a wide range of industries. To get there took time and effort. Our management team invested in the development of our people, determined to make our highly-experienced tradespeople renowned as the best in their industries.
With over 90 years of documented lessons learned, we are able to consistently apply that knowledge - meeting our customers’ most demanding challenges, in their most critical environments.