Two directors of Connacher Oil & Gas Ltd., Calgary, will oversee day-to-day operations of the company on an interim basis after the departure of Richard A. Gusella, chairman, chief executive officer, president, and interim chief operating officer.

Colin M. Evans, Connacher lead director and president of Evans & Co. Inc., and Kelly J. Ogle, director of Connacher and president and chief executive officer of Trafina Energy Ltd., have been appointed interim comanaging directors.

Connacher produces bitumen and conventional crude oil and natural gas in Canada and operates a 9,500 b/d heavy oil refinery in Great Falls, Mont.