Upcoming Events

Tuesday, February 21, 2023 OSSGA Conference - IN PERSON

Hilton Toronto Hotel

Monday, February 27, 2023 OSSGA Common Core Training - ONLINE
Thursday, March 2, 2023 Concrete Ontario Annual Ski Day

Osler Bluff Ski Club, Collingwood, ON

Thursday, April 13, 2023 OSSGA Aggregates 101 - IN PERSON
Holiday Inn Sudbury
Friday, April 14, 2023 OSSGA Aggregates 201 - IN PERSON
Holiday Inn Sudbury
Gravel Facts

Our Organizational Structure

The Ontario Stone, Sand & Gravel Association is directed by elected Officers and a Board of Directors. Association committees, comprised of volunteers, complement the services provided to the membership. The Executive Director and staff handle the routine business affairs of the Association and regularly report to the Board.


  • Chair of the Board: Ryan Wall, Walker Aggregates
  • Vice Chair of the Board: Rob Pierce, R.W. Tomlinson
  • Treasurer: Jim Petrella, Dufferin Aggregates, a Division of CRH Canada Group Inc.
  • Immediate Past Chair: Scott Boyle, Miller Paving
  • Executive Director:  Norman Cheesman (ex-officio Board Member)

Active Directors  

  • Mike Andrighetti, Ethier Sand & Gravel Limited
  • Blake Arnill, Seeley & Arnill Construction
  • Ron Brent, Brent Quarries
  • Ryan Held, CBM Aggregates
  • Frank Kielbowich, Nelson Aggregate Co.
  • John Mackay, Aecon Construction & Materials
  • Robert Mantha, Walker Aggregates
  • Lauren Mulkerns, Brampton Brick
  • Matthew Ruggieri , Lafarge Holcim Canada Inc.  
  • Ken Zimmerman, Miller Paving

Ex-Officio Active Directors

  • George Lourenco, Capital Paving
  • Dwayne McKenzie, Nelson Aggregate Co.

Associate Directors

  • John Buhlman, WeirFoulds, LLP
  • John Newton, Austin Powder
  • Tecia White, Whitewater Hydrogeology Ltd.