Upcoming Events

Monday, November 11, 2019 Generic Supervisor Training Course
OSSGA Office, Mississauga, ON
Thursday, November 14, 2019 at 9:00 AM OSSGA Common Core Surface Miner Training
OSSGA Office, Mississauga
Wednesday, January 22, 2020 OSSGA Operations, Health & Safety Seminar


CLICK HERE - To book your hotel room at the Marriott Toronto Airport Hotel

Tuesday, February 11, 2020 OSSGA Conference and AGM

Book your hotel room early at Hilton Niagara - CLICK HERE

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: Quinn Moyer, Nelson Aggregate Co.
  • Vice Chair of the Board: George Lourenco, Capital Paving
  • Secretary: Mark Geens, Lafarge Holcim Canada Inc.
  • Treasurer: Scott Boyle, Miller Group
  • Immediate Past Chair of the Board: Bill Marquardt, CBM Aggregates
  • Executive Director:  Norman Cheesman  (Ex Officio Board Member)


Active Directors  

  • Ron Brent, Brent Quarries
  • Richard Erdmann, Dufferin Aggregates, a Division of CRH Canada Group Inc.
  • David Hanratty, CBM Aggregates
  • Bill Kester, Summit Aggregates
  • Frank Kielbowich, Walker Industries
  • Anson Le, Rice Aggregates Limited
  • John Mackay, Aecon Construction & Materials
  • Rob Pierce, R.W. Tomlinson
  • Ryan Wall, Walker Industries
  • Bruce Willmer, Lafarge Holcim Canada Inc.  
  • Rob Cummings, Lafarge Holcim Canada Inc. (ex-officio)

Associate Directors

  • Jason Lang, Creighton Rock Drill Limited
  • Heather Melcher, Golder Associates Ltd.
  • Jim Thornton, Toromont CAT
  • David White, Devry Smith Frank LLP
  • Angelo Muscillo, Bulk Transfer Systems (ex-officio)

Active Past Chairs

  • Ryan Essex (2013), Miller Paving
  • James Gordon (2015), Fowler Construction
  • Steve Bisson (2016), Nelson Aggregate Co.
  • Dan O'Hara, (2017), Dufferin Aggregates, a Division of CRH Canada Group Inc.