The Ontario Association of Foundation Specialists is an organization of contractors and subcontractors engaged in geotechnical construction work in the Province of Ontario. 

Individual member firms specialize in particular aspects of geotechnical construction, with a number of firms that perform all techniques of contracting in the broad umbrella of geotechnical construction. In most cases our member firms possess design/build capabilities.

The majority of the member firms are also active in international associations whose mandates cover various geotechnical techniques.