John R. Devlin
ESTATE LITIGATION LAWYER
About John R. Devlin
John is an estate litigation lawyer in Vest Estate Law’s Calgary office, focusing on contested wills, estate disputes, and estate litigation. Called to the Alberta Bar in 2012, he brings more than a decade of civil litigation experience, including insurance coverage, construction, and energy disputes.
John acts for personal representatives (executors), beneficiaries, and other interested parties in contested estate applications, mediations, judicial dispute resolution (JDR), appeals, and trials. He has appeared before the Court of King’s Bench of Alberta, the Alberta Court of Appeal, the Federal Court, and, on applications for leave, the Supreme Court of Canada. Before joining Vest, he practised with national and regional firms in Calgary.
In Adomauskas v Chrolavicius, 2022 ABQB 567, John was lead trial counsel for the successful plaintiff in a contentious estate trial involving proprietary estoppel and constructive trust claims. The Court found proprietary estoppel established and ordered title to the property transferred to his client.
John holds an LL.M. from Harvard Law School, where he was a Fulbright Scholar and recipient of the Viscount Bennett Scholarship. His Harvard paper, “There ought to be a reference”: the Canadian embrace of judicial advisory opinions in historical and comparative context (2014), was supervised by Professor Mark Tushnet. He earned his LL.B. with distinction from the University of Alberta, receiving the Judges’ Bronze Medal, and a B.A. in History with distinction from the University of Calgary. He clerked for the Honourable Justice Dolores Hansen at the Federal Court of Canada.
In October 2024, following the birth of twin daughters, John stepped away from private practice to be the primary caregiver for his four young children while his spouse began an academic appointment at the University of Calgary. During that time, he coached youth baseball with Rocky Mountain Little League and Alberta Fall Ball. He returned to practice at Vest Estate Law in 2026. Outside the office, John is a keen student of legal and military history. He is a member of the Law Society of Alberta.
Passion and achievements
- Contentious estate litigation, including proprietary estoppel, constructive trust, claims against personal representatives, and proof of wills in solemn form.
- More than ten years of civil litigation in Alberta with national and regional firms, including insurance coverage, construction, energy, corporate, and estate disputes, with appearances at all levels of court in Alberta and in the Federal Court.
- LL.M., Harvard Law School (2014). Fulbright Scholarship (Fulbright Canada Medal, 2013). Viscount Bennett Scholarship, Law Society of Alberta (2013).
- LL.B. with distinction, University of Alberta (2011). Judges’ Bronze Medal. Dean’s List and first-class standing, 2009, 2010, and 2011.
- Clerk to the Honourable Justice Dolores Hansen, Federal Court of Canada (2011–2012), including assistance with her work as a judicial member of the Administrative Tribunal of the International Labour Organization.
- Mentorship of articling students and junior associates in private practice.
Notable Outcomes
Successfully defended a trial decision on will interpretation at the Alberta Court of Appeal
Date: 2023
Notable Outcome: In Strafford Estate (Re), 2023 ABCA 99, John was appellate counsel for the successful party in an estate dispute about the interpretation of a will and the testator’s intentions regarding an annuity. The Alberta Court of Appeal upheld the trial judge’s finding that the testator intended to give his daughter income during her lifetime, rather than an inheritable lump-sum benefit for her estate. The decision confirmed the proper use of extrinsic evidence to determine testamentary intent.
Secured a court order transferring title to property for a successful estate plaintiff
Date: 2022
Notable Outcome: In Adomauskas v Chrolavicius, 2022 ABQB 567, John was lead trial counsel for the successful plaintiff in a contentious estate trial involving proprietary estoppel and constructive trust claims. The Court found proprietary estoppel established and ordered title to the property transferred to the plaintiff.
Decision
Acted in a commercial dispute over replacing an insolvent oil and gas operator
Date: 2016
Notable Outcome: In Bank of Montreal v Bumper Development Corporation Ltd., 2016 ABQB 363, John was counsel of record in a commercial dispute about the enforceability of contractual provisions for replacing an insolvent oil and gas operator. The Court upheld a co-owner’s right to assume operatorship under the parties’ operating agreement, despite the receivership and court-approved sale of the underlying oil and gas assets.
Acted in a complex appeal clarifying limitation periods for contribution claims
Date: 2015
Notable Outcome: In Whitecourt Power Limited Partnership v Elliott Turbomachinery Canada Inc., 2015 ABCA 252, John acted as counsel in a complex commercial appeal about the interpretation of Alberta’s Limitations Act and the limitation periods that apply to claims for contribution and indemnity. The Alberta Court of Appeal clarified when the limitation period for a third-party contribution claim begins to run. It also addressed how the summary judgment test applies in complex, multi-party litigation.
Acted in a contested application on the production of electronic financial records
Date: 2018
Notable Outcome: In Allan v. Epp, 2018 ABQB 85, John acted as counsel in a contested civil procedure application about the scope of documentary discovery and the production of electronic records. Among other issues, the Court considered whether relevant financial data should be produced in its original, usable Excel format rather than as static TIFF images. In doing so, it weighed the parties’ discovery obligations and the proportionality of the requested production.
Extra training and designations
- LL.M., Harvard Law School, 2014. Paper: “There ought to be a reference”: the Canadian embrace of judicial advisory opinions in historical and comparative context, written under the supervision of Professor Mark Tushnet.
- Fulbright Scholarship (Fulbright Canada Medal Award), 2013.
- Viscount Bennett Scholarship, Law Society of Alberta, 2013.
- Judges’ Bronze Medal, University of Alberta Faculty of Law, 2011.
- Clerkship, Federal Court of Canada, 2011–2012.
Professional memberships
- Law Society of Alberta, 2012 to present.