Ms. Southern-Heathcott is President & Chief Executive Officer of Spruce Meadows Ltd., an internationally recognized equestrian facility in Calgary, Alberta. As a former professional equestrian rider, Ms. Southern-Heathcott was a member of the Canadian Equestrian Team for nine years and competed in the 1996 Olympic Summer Games in Atlanta, Georgia. Ms. Southern-Heathcott was appointed Vice Chair of the Board of Directors of ATCO in November 2016 and of Canadian Utilities and CU Inc. on March 1, 2017.

Ms. Southern-Heathcott is a founding director, and currently serves as Board Chair, of AKITA Drilling Ltd. Ms. Southern-Heathcott also serves on the Boards of ATCO Structures & Logistics Ltd., Sentgraf Enterprises Ltd, TELUS Calgary Community Board and is a member of the National Music Centre Benefit Auction Committee.

In 2010, Ms. Southern-Heathcott received her ICD.D certification from the Director Education Program of the Institute of Corporate Directors.