Grace Instrumentation & Controls Ltd.
Grace Instrumentation & Controls was founded by Terry Grace in 1998. In February 2026, Rob Telfer and Chris Slaney purchased the company from Scott Marr and Lisa Marr, ushering in a new chapter in the company’s history.
While ownership has changed, the core values that have defined Grace Instrumentation & Controls remain the same: acting with integrity, providing the right people for the job, and delivering quality workmanship and service that keep customers coming back.
These values have helped Grace Instrumentation & Controls navigate decades of economic and industry changes. Our reputation is built on a team of qualified, experienced tradespeople and professionals who are committed to completing every project safely, on time, and within budget. Under the new ownership of Rob Telfer and Chris Slaney, we remain committed to building strong customer relationships, delivering dependable service, and continuing the tradition of excellence that has defined Grace since 1998.
Give us a call and discover the Grace difference.
The Mid-Halton Wastewater Treatment Plant. One of our ongoing projects that you can see more about in our portfolio of work.
Proudly Supporting Unions
Grace is a proud partner with the IBEW (International Brotherhood of Electrical Workers), UA (United Association of Journeyman and Apprentices of the Plumbers and Pipefitting Industry) and the Millwright Regional Council – Canada.
As a unionized contractor, you can be sure that our tradespeople have the training and the adherence to health and safety you want for your project. Check out the Ontario Construction Secretariat’s report at https://iciconstruction.com/.
Celebrating 25 Years
To many of us, 1998 doesn’t feel that long ago. It was in 1998 when Grace Instrumentation was established by Terry Grace. Our continuing mission is to serve our clients and our community in a way that exceeds expectation.
Thank you for 25 great years. Here’s to the next 25 years.
Execute Your Next Project with Grace
- (519) 428-2091
- Based in Simcoe, Ontario
Grace Instrumentation & Controls has the experienced team to help your company resolve operational issues and complex renovation or construction projects on time and on budget. Experience operational excellence with Grace.