Colena’s practice focuses on advising Canadian and foreign-based clients on the taxation of mergers and acquisitions, corporate reorganizations and employee and executive compensation matters, with an emphasis on the resource, emerging companies and technology sectors. Her tax practice also includes the settlement of tax disputes with the Canada Revenue Agency. Colena is a member of the Canadian Bar Association, Calgary Bar Association, the Canadian Tax Foundation and the Canadian Petroleum Tax Society. She was a former member of the Canadian Tax Foundation - Young Practitioners' Steering Committee (Calgary) and the past chair of the Executive Committee of the Canadian Bar Association’s Taxation Specialists (South). In 2022, Colena was recognized as one of Lexpert’s Rising Stars: Leading Lawyers Under 40.
On June 8, 2015, Aspenleaf Energy Limited (Aspenleaf) completed its acquisition of all of the issued and outstanding common shares of Arcan Resources Ltd. (Arcan). The acquisition was carried out pursuant to the terms of a plan of arrangement that was approved by Arcan’s shareholders on June 2, 2015. The total value of the acquisition was approximately $300 million, including assumed debt.