Colena Der

Colena Der

Partner, Tax

Contact Information

tel: 403.260.7049



Bar Admission

Alberta, 2009


  • University of Ottawa, LL.B.
  • University of Alberta, B.Sc. (Hons.) (Pharmacology)



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 by Lexpert as one of Canada’s Rising Stars: Canada’s Leading Lawyers Under 40. The Lexpert Rising Stars awards recognize private practice and in-house lawyers who are emerging leaders in the Canadian legal community. Winners are selected by a distinguished advisory board, which considers the contributions that nominees make to their firm, company or department, as well as to the profession and larger community.

  • M3-Brigade Acquisition III Corp.

    M3-Brigade Acquisition III Corp. in its US$950 million business combination with Greenfire Resources Inc.

  • KKR and AIMCo

    KKR and AIMCo in the amendment of the partnership and related agreements in respect of their equity investment in the $11.2B Coastal GasLink Pipeline

  • Xero

    Xero in its acquisition of TaxCycle

  • OpenChannel

    OpenChannel in its acquisition by Stripe

  • Amarillo Gold Corp.

    Amarillo Gold Corp. in its acquisition by Hochschild Mining PLC

  • Microsoft

    Microsoft in its acquisition of Two Hat

  • Canadian Natural Resources Limited

    Canadian Natural Resources Limited in the restructuring of the North West Redwater Refinery

  • Genesis Fertilizers

    Genesis Fertilizers in its partnership formation and equity capital raise to develop a 700,000 metric tonne urea plant and six distribution facilities in Western Canada at an estimated $1.7 billion

  • 2223890 Alberta Ltd.

    2223890 Alberta Ltd. in its $195 million go-private transaction with Rocky Mountain Dealerships Inc.

  • Radian Capital

    Radian Capital in its lead investment in's $30 million Series A financing round

  • Golder Associates Corporation

    Golder Associates Corporation in its $1.5 billion acquisition by WSP

  • NewSpring Capital

    NewSpring Capital in MacroHealth's $54 million Series A financing round

  • Newterra Group Ltd.

    Newterra Group Ltd. in its acquisition by Frontenac

  • Delphi Energy Corp.

    Delphi Energy Corp. in its restructuring transaction under the CCAA

  • Husky Energy Inc.

    Husky Energy Inc. in its $1.25 billion public offering

  • ESC Corporate Services

    ESC Corporate Services in its acquisition of Paragon

  • Fairhaven Pharmaceuticals

    Fairhaven Pharmaceuticals in its acquisition by Liminal BioSciences

  • Maverix Metals Inc.

    The underwriters in the US$45.54 million cross-border secondary offering of common shares of Maverix Metals Inc. by Pan American Silver Corp.

  • Quicken Loans

    Quicken Loans and Rock Holdings in Edison Financial’s Preferred Round

  • Canadian Pacific Railway’s US$500 million offering

    The Underwriters in Canadian Pacific Railway’s US$500 million offering

  • Canadian Pacific Railway

    The syndicate of agents in Canadian Pacific Railway’s $300 million Canadian offering

  • Greengate Power Corporation

    Greengate Power Corporation in its agreement with Copenhagen Infrastructure Partners to develop Travers Solar – Canada’s largest operating solar energy project

  • Steel Reef Infrastructure Corp.

    Steel Reef Infrastructure Corp. in its $500 million acquisition of natural gas infrastructure assets from Crescent Point Energy Corp.

  • KKR

    Acting for KKR and AIMCo in their joint acquisition of a combined 65% equity interest from TC Energy in the $6.8B Coastal GasLink Pipeline Project

  • Trive Capital Management

    Trive Capital Management in its acquisition of Finalé Post Production

    • ScribbleLive Rock Content in its acquisition of ScribbleLive
    • Mitel Networks on its acquisition of Aastra Technologies
    • Angle Energy Inc. In its proposed $576 million acquisition by Bellatrix Exploration Ltd.
    • Total E&P Canada Ltd. on the agreement to sell its 49% interest in the Voyageur Upgrader Limited Partnership to Suncor Energy Inc.
    • Greengate Power Corporation on all aspects of the development of the 300 MW Blackspring Ridge Wind Project and the sale of the Blackspring Ridge Project to Enbridge Inc. and EDF EN Canada Inc.
    • Golden Crescent Investments Ltd., an affiliate of Citadel Capital, in its proposed sale of National Petroleum Company Egypt Limited, to Sea Dragon Energy Inc.
    • SCF Partners in its acquisition of Integrated Production Services
    • Thule Group of Sweden on its acquisition of Chariot Carriers
    • Glam Media Inc. In its cross border acquisition of BBS Media
    • Investment Technology Group, Inc. In its $38.5 million acquisition of a private independent research brokerage firm
    • Temple Energy Inc. In its “merger of equals” with Cequence Energy Ltd.
    • Kulczyk Oil Ventures Inc. In its European initial public offering and acquisition of Triton Hydrocarbons Pty Ltd., an Australian company
  • Find More

  • International Tax Review: Recognized in Women in Tax as a Highly Regarded lawyer
  • Best Lawyers in Canada: Recognized in Tax Law
  • Lexpert Rising Stars: Recognized as a Rising Star
  • The Canadian Legal Lexpert Directory: Recognized in Corporate Tax

  • Law Society of Alberta
  • Canadian Bar Association
  • Canadian Tax Foundation
  • Canadian Petroleum Tax Society