Ciara J. Mackey
Partner

Outline
Ciara Mackey helps clients navigate their most complex legal problems and high stakes appeals with practical advice and compelling advocacy.
Overview
Client Work
Successful appellate proceedings on behalf of a North American Railway overturning a judgment for over $200 million relating to a failed real estate transaction and the claimed opportunity for a real estate development. Remington Development Corporation v. Canadian Pacific Railway, 2025 ABCA 244
Dow Chemical Canada in its successful C$3.56-billion claim against NOVA Chemicals for breaches of contract
The landlord in a successful claim for breach of lease against a tenant who had leased an entire 37 story office building and then vacated it with 12 years left on the lease, claiming that a minute amount of hazardous materials in building materials from decades earlier justified that decision. CNOOC Petroleum North America ULC v 801 Seventh Inc, 2025 ABKB 145; 2023 ABCA 97 ; 2021 ABQB 861; 2021 ABQB 81
A large energy company in prosecuting allegations of fraud and self-dealing against a group of former contractors.
Dow Chemical Canada ULC and Dow Europe GmbH, in a successful $1.3-billion breach of contract claim against the operator of a jointly owned ethylene manufacturing facility.
Wood Group Mustang (Canada) Inc., in defence of an action commenced by Canadian Natural Resources Limited, in the failure of an underground emulsion pipeline in 2009. Amounts claimed are in excess of $80 million.
Recognitions & Awards
Benchmark Litigation: Canada
Recognized as a Future Star
Related Services
Education & Bar Admissions
Education
- University of Calgary, Faculty of Medicine, BHSc, 2007
- University of Alberta, LLB, 2011
Bar Admissions
- Alberta, 2012