Upcoming Events

Thursday, May 2, 2024 OSSGA Common Core Training - INPERSON
Thursday, May 30, 2024 OSSGA Quality Control Training - IN PERSON
Tuesday, June 4, 2024 OSSGA Aggregates 101 - IN PERSON
OSSGA Office
Wednesday, June 5, 2024 OSSGA Aggregates 201 - IN PERSON
Thursday, June 13, 2024 OSSGA Common Core Training - ONLINE
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: Jim Petrella, Dufferin Aggregates, a Division of CRH Canada Group Inc.
  • Vice-Chair of the Board: John Mackay, Aecon Construction & Materials
  • Treasurer: Dwayne McKenzie, Nelson Aggregate Co.
  • Immediate Past Chair:  Rob Pierce, R.W. Tomlinson
  • Executive Director:  Michael McSweeney (ex-officio Board Member)

Active Directors  

  • Mike Andrighetti, Ethier Sand & Gravel Limited
  • Blake Arnill, Seeley & Arnill Construction
  • Shannon Burrows, Weeks Construction
  • Ryan Held, CBM Aggregates
  • Frank Kielbowich, Waterford Sand & Gravel
  • Robert Mantha, Walker Aggregates and Construction
  • Mohamed Mousa, Dufferin Aggregates, a Division of CRH Canada Group Inc.
  • Matthew Ruggieri , Lafarge Holcim Canada Inc.  
  • Ken Zimmerman, Miller Paving

Ex-Officio Active Directors

  • Ryan Wall, Walker Aggregates 

Associate Directors

  • John Newton, Austin Powder
  • Kim Mullin, Wood Bull
  • Brian Sulley, RWDI