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Upcoming Events

Tuesday, February 27, 2018 at 8:00 AM OSSGA Spills Response Training
OSSGA Office, Mississauga
Tuesday, February 27, 2018 at 12:45 PM OSSGA Confined Spaces Training
OSSGA Office, Mississauga
Wednesday, February 28, 2018 at 8:00 AM OSSGA Working at Heights Training
OSSGA Office, Mississauga
Monday, March 26, 2018 at 9:00 AM OSSGA Generic First Line Supervisor Training

OSSGA Office, Mississauga, ON

Thursday, March 29, 2018 at 9:00 AM OSSGA Common Core Surface Miner Training

OSSGA Office, Mississauga

Thursday, April 12, 2018 at 8:30 AM OSSGA Aggregates 101 Training in Sudbury

Holiday Inn Sudbury Hotel

The Hole Story

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 CEO and staff handle the routine business affairs of the Association and regularly report to the Board.


  • Chair of the Board: Dan O'Hara, CRH Canada Group Inc. 
  • Vice Chair of the Board: Bill Marquardt, CBM Aggregates
  • Secretary: Mark Geens, Lafarge Holcim Canada Inc.
  • Treasurer: Quinn Moyer, Nelson Aggregate Co.
  • Immediate Past Chair of the Board: Steven Bisson, Nelson Aggregate Co.
  • Executive Director:  Norman Cheesman  (Ex Officio Board Member)


Active Directors  

  • Scott Berquist, R.W. Tomlinson
  • Xavier Guesnu, Lafarge Holcim Canada Inc.
  • David Hanratty, CBM Aggregates
  • Bill Kester, Waterford Sand & Gravel
  • George Lourenco, Capital Paving
  • Richard Erdmann, Dufferin Aggregates, a Division of CRH Canada Group Inc.
  • Erwin Schulz, Aecon Construction & Materials
  • Jim Thomas, Coco Group
  • Ryan Wall, Walker Industries
  • Scott Boyle , Miller Group


Associate Directors

  • Angelo Muscillo, Bulk Transfer Systems
  • Heather Melcher, Golder Associates Ltd.
  • Darrin Rousselle, Kal Tire
  • David White, Devry Smith Frank LLP

Active Past Chairs

  • Malcolm Croskery (2014), Pioneer Construction
  • Ryan Essex (2013), Miller Paving
  • Terry Waites (2011), JC Rock Ltd.
  • James Gordon (2015), Fowler Construction