Heather L. Treacy, Q.C. is a highly sought after and nationally recognized counsel whose practice is ‎focused on civil litigation and dispute resolution.‎

Heather is the former Managing Partner of the Calgary office of DLA Piper (2013-2019) and is currently an ‎elected member of DLA Piper’s Executive Committee. She has over 25 years of experience in acting as ‎counsel to clients in complex litigation and disputes, and has extensive experience with negotiations and ‎mediation on matters related to energy and resources law, indigenous and constitutional law, general ‎commercial disputes, transportation, aviation, products liability, human rights, employment law and ‎intellectual property law. She frequently appears before both the Trial and Appellate Courts in the Province ‎of Alberta, the Federal Court of Canada, the Federal Court of Appeal and various tribunals, including the ‎Canadian Human Rights Tribunal, energy related tribunals and the Canadian Transportation Agency.‎

Heather has extensive knowledge of the energy industry, particularly in the oil and gas sector. She has ‎acted on numerous oil and gas disputes, including contract, lease, farm-out and operating agreement ‎issues and royalty calculation disputes. Heather also has specific expertise in indigenous law and provides ‎advice on a significant number of issues involving treaty, indigenous rights and indigenous title issues and ‎has been involved in several precedent setting cases.‎

Heather has been recognized for her expertise in the area of dispute resolution by leading lawyer ‎ranking guides Benchmark Canada (Litigation Star), Acritas (Star ‎Lawyer), Chambers Canada, ‎Legal 500 ‎Canada and Euromoney. In the area of indigenous law, she has been recognized by ‎The Canadian Legal Lexpert Directory, Best Lawyers in Canada, Chambers Global and ‎Chambers Canada. In 2014, Heather was named one of WXN’s Top 100, Canada’s Most ‎Powerful Women, in 2016, she was a Women in Law Leadership (WILL) Award winner in the ‎‎“Leadership in the Profession in Private Practice” ‎‎category‎, and in 2017 she was named a ‎winner of the Lexpert Zenith ‎Awards: Celebrating Women in Law. Most recently, Heather was an ‎Excellence Award Recipient in the Woman of the Year category for the 2020 Canadian Law ‎Awards.‎

Heather is active in the community and has a passion for the arts. She is the former Chair of the Board of ‎Directors of the Calgary Philharmonic Orchestra. She is a member of the Board of Directors of the ‎University of Calgary Alumni Association.‎