Ron Deyholos

Ron Deyholos

Calgary: 403.776.3718
Fax 403.776.3800


LLB, 1989
University of Calgary
BEd, 1979
University of Calgary

Bar Admissions

Alberta, 1990


Ron Deyholos is a member of the firm’s Executive Committee and is head of the firm's Calgary office. His practice focuses on energy, M&A and project development. He has advised on all aspects of the development and operation of various energy projects in Canada, including major offshore oil and gas, oil sands, cogeneration and wind power projects. Ron’s experience includes advice on joint ventures, partnerships, energy supply agreements, production and facilities construction, and operating matters. His energy expertise includes asset and share acquisitions and divestitures.

Ron also has significant experience in the outsourcing and contracting of business processes and services, including of energy and power project management, operations and maintenance.

Representative Work

Load More


Best Lawyers' Best Lawyers in Canada—Leading lawyer in energy law (2010-2018)

Chambers & Partners’ Chambers Canada—Leading lawyer in Canada, energy: oil & gas (transactional) (2016-2018)

Chambers & Partners' Chambers Global: World’s Leading Lawyers for Business, The Client's Guide—Leading lawyer in energy: oil and gas (transactional) (2013-2018)

Euromoney's Guide to the World's Leading Energy and Environment Lawyers—Leading lawyer (2017)

Lexpert/Thomson Canada’s Canadian Legal Lexpert Directory—Leading lawyer in infrastructure (2016) oil and gas (2011-2017)

Chambers & Partners' Chambers Global: World’s Leading Lawyers for Business, The Client's Guide, 2007-2012—Leading lawyer in energy: power and energy: oil and gas

Law Business Research’s Who’s Who Legal—Leading Canadian lawyer in oil and gas (2009-2012) and energy (2016-2017)


Canadian Oil and Gas: Midstream and Financing Activity on the Rise

Capital Markets Mid-Year Report 2016

Further Unlocking Value Creation in West African Exploration and Production

Speaker, Oil Council Africa Assembly, Paris, France

"The Right Fit": Identifying the True Predictors of Success within Your Firm Culture

Panellist, 8th Annual Canadian Bar Association Law Firm Leadership Conference, Calgary

Joint Ventures and Strategic Alliances

Speaker, Advanced Canadian Oil & Gas M&A Forum, Calgary


Professional Involvement

Ron frequently speaks at conferences and seminars on topics relating to the development and operation of major energy projects.

Before joining Torys, Ron was a partner at another major Canadian law firm.

Memberships and Affiliations

  • Canadian Petroleum Law Foundation
  • International Bar Association (Section on Energy and Resources Law)