Believeco:Partners is building a leading independent marketing and communication agency in North America. Founded in Calgary, Alberta, Believeco:Partners is among the largest owners, operators and builders of the foremost marketing, communications and engagement agencies. With international coverage and full-service capabilities, Believeco:Partners serves mid-market North American clients with digital marketing, social media, public relations and affairs, content and production, media services, strategy and research.

As part of Believeco:Partner’s initial launch, they join together six leading agencies – Venture Play, Argyle, Brightworks, Zync, Revolve and Castlemain which will continue to serve its clients under the Believeco and Castlemain banners. Due to its positioning and recognition within the indigenous ecosystem, Castlemain will continue to operate as a leading advisory firm serving indigenous nations, communities and peoples, with expertise in governance, negotiation, economic development, lands, infrastructure and strategic engagement and communications. Castlemain will continue to be led by Rob McPhee as President.

Believeco:Partners is led by its CEO, Mario Simon, and Executive Chair & Co-Managing Partner, Arlene Dickinson (Founder of Venture Play).



Head Office

Calgary, AB

Invested Since

November 2022


Marketing & Communications


Mario Simon, CEO
Arlene Dickinson, Executive Chair & Co-Managing Partner, M&A