The Association of Consulting Engineering Companies also known as ACEC - Canada, and formerly called the Association of Canadian Engineering Companies, is an association of six hundred independent engineering consultancies across Canada. Its members offer professional engineering services to the public and private sectors worldwide. Based in Ottawa, the association's mission is to promote a business environment that recognizes and rewards Canadian consulting engineering companies' expertise and contributions to society. The members are independent consulting engineering firms as well as twelve affiliated provincial and territorial member organizations. Members range in size from single-person operations to multinational companies. The association publishes a serial magazine, the Canadian Consulting Engineer.