Thomas Slade

Tom wants to ensure you are putting your best foot forward at the appeal stage. From complex legal research to drafting persuasive factums, he helps to elevate appellate advocacy. As a former Editor-in-Chief of the Ottawa Law Review and the founder of Fantasy Courts, Tom provides clients advice that is in tune with the latest developments in the law.

Bar admission.

Ontario, 2011



University of Ottawa, L.L.B., 2010
Carleton University, B.J. (Bachelor of Journalism), 2007


Thomas Slade is a partner at Supreme Advocacy. His litigation practice is focussed on appeals and leaves to appeal. He has appeared as counsel before the Ontario Court of Appeal and Federal Court of Appeal and as co-counsel at the Supreme Court of Canada. Thomas’ legal research practice includes aboriginal law, constitutional law, religious freedom, professional negligence, and regulatory matters. He has prepared numerous legal opinions, taking complex legal issues and addressing them in a straightforward and practical manner.

Before joining Supreme Advocacy, Thomas articled and returned as an associate at a national law firm where he focused on advocacy and litigation. He also worked as a student-at-law at an access to information and administrative law boutique firm. While at the University of Ottawa, Thomas was the Articles Editor and Editor-in-Chief for the Ottawa Law Review and worked as a research assistant for a prominent technology law professor. Before law school, he received a Bachelor of Journalism from Carleton University.

As SCC Agent:

  • Ramelson v. R., 39664 – Criminal law, abuse of process
  • Peter Nygard v. Attorney General of Canada on behalf of United States of America, 39647 – Extradition
  • Earle v. R., 39622 – Criminal law, appeals
  • Ali v. R., 39590 – Criminal law, search and seizure
  • J.A. v. R., 39364 – Criminal law, interim release review
  • Othen v. R., 39339 – Criminal law, appeals
  • Poxleitner v. R., 39333 – Canadian charter, Charter of Rights and Freedoms
  • Jaswant Singh Chahal v. Sarbjit Kaur Chahal aka Sarbjit Chahal, 39312 – Property, trusts
  • Phillips Legal Professional Corporation, et al. v. Cowessess First Nation No. 73, et al., 39135 – Constitutional law, division of powers
  • Roy v. R., 39127 – Canadian charter (criminal)
  • Yusuf, v. R., 39110 – Criminal law, Charter of Rights
  • Cowell v. R., 39078 – Canadian charter (criminal)
  • Anngylla Daune Aisaican-Chase v. Her Majesty the Queen, 39055 – Provincial offences, strict liability
  • Health Genetic Center Corp. o/a Health Genetic Center, et al. v. Peter Aldhous, et al., 39047 – Defamation, impartiality
  • Riley v. R., 39006 – Criminal law, Vetrovec warning
  • Siwicki v. R., 38960 – Criminal law, sentencing
  • Ponace v. R., 38948 – Criminal law, charge to jury
  • TransAlta Generation Partnership v. Balancing Pool, 38920 – Legislation, interpretation
  • Terry Blaine Gustafson v. Input Capital Corp., 38880 – Contracts, unconscionability
  • Nippon Yusen Kabushiki Kaisha, et al. v. Darren Ewert, 38784 – Civil procedure, class actions
  • Froese v. R., 38778 – Criminal law, powers of the Court of Appeal
  • Froese v. R., 38778 – Criminal law, appeal jurisdiction
  • 2386240 Ontario Inc., et al. v. The Regional Municipality of Peel, 38771 – Municipal law, by-laws
  • Vader v. R., 38764 – Criminal law, delay

  • Linda Gardipy v. Saskatchewan Government Insurance, 38659 – Civil procedure, costs
  • Franca Zeppa, et al. v. Woodbridge Heating & Air-Conditioning Ltd., 38569 – Civil procedure, limitation of actions
  • P., v. R., (38546) – Canadian Charter (criminal), sexual assault, leave granted 3/12/20
  • Steven Kerzner v. American Iron & Metal Company Inc., 38503 – Employment law, labour standards
  • Dalkeith-Mackie v. Her Majesty the Queen, 38465 – Criminal law, sentencing
  • Van Wissen v. R. 38458 – Criminal law, DNA samples
  • Omar v. R., 38339 – Criminal law, sentencing
  • Williams v. R., 38304 – Criminal law, entrapment
  • R. v. C.J., 2019 SCC 8 – Criminal law, evidence
  • Gerald Lane, et al. v. Robert Paul Pierce, et al., 37945 – Torts, MVA
  • Khawar Hanif v. College of Veterinarians of Ontario, 37900 – Regulatory, professional misconduct
  • Behrouz Salehi v. Association of Professional Engineers of Ontario, 37174 – Regulatory, professional misconduct
  • M. v. R., 37895 – Criminal law, sentencing
  • Rasberry v. R., 37686 – Criminal law, provocation
  • Rennie v. R., 37632 – Criminal law, sentencing, Aboriginal offenders
  • TNR (TNM) v. W.P.R., 37341 – Family law, custody
  • Law Society of British Columbia v. Trinity Western University, 2018 SCC 32 – Administrative law, freedom of religion
  • Trinity Western University v. Law Society of Upper Canada, 2018 SCC 33, Administrative law, freedom of religion
  • R.C. v. R., 37220 – Criminal law, appeals
  • R.  v. Hall, 36886 – Criminal law, appeals

As Counsel:

  • Chippewas of the Thames First Nation v. Enbridge Pipelines Inc., 2017 SCC 41 and Clyde River (Hamlet) v. Petroleum Geo‑Services Inc., 2017 SCC 40 – Aboriginal law, treaty rights – Co-counsel for an intervener
  • R. v. Barabash, 2015 SCC 29 – Criminal law, private use exception – Co-counsel for the appellant

Recent Appellate Work:

  • John Doe v. The Roman Catholic Episcopal Corporation of St. John’s, 2020 NLCA 27. Judgment released 07/28/2020, – Nfld. & Labrador C.A. found Roman Catholic Episcopal Corporation of St. John’s financially liable for sexual abuse at the Mount Cashel orphanage in the 1950s. Eugene Meehan, Q.C. and Thomas Slade of Supreme Advocacy LLP argued the appeal along with trial counsel Geoff Budden and Paul Kennedy of Budden & Associates.
  • Patel v Carson, 2018 SKCA 98 – Administrative law, regulation of professionals – Co-counsel for the appellant
  • Srebrolow Lebowitz Spadafora PC v. PW Lawyers Professional Corporation, 2018 ONCA 64 – Contract law, referral fees – Counsel for the appellant
  • TMS Lighting Ltd. v. KJS Transport Inc., 2017 ONCA 427 – Assessment of damages – Counsel for the appellant
  • Association of Justices of the Peace v. The Queen, 2014 ONSC 4231 – Constitutional law, pensions – Co-counsel for the applicant
  • Canada (Attorney General) Vorobyov, 2014 FCA 102 – Administrative law – Counsel for an intervener before the Federal Court of Appeal
  • TMS Lighting Ltd. v. KJS Transport Inc.,2014 ONCA 1 – Nuisance and proof of damages – Counsel for the appellant before the Ontario Court of Appeal
  • Reference re section 14 of the Agriculture and Agri-Food Administrative Monetary Penalties Regulations,2012 FCA 130 – Agricultural Review Tribunal – Counsel for the applicant before the Federal Court of Appeal

Read more
  • Ontario Bar Association
  • Canadian Bar Association
  • County of Carleton Law Association
  • Resolving Equality Uncertainty: Adverse-effects Claims and Conflicts Between Equality-seeking Claimants, Supreme Court Law Review, 2nd Series, volume 79, co-author
  • Getting In, Getting Heard, Getting Practical: Intervening in Appellate Courts Across Canada, The Advocates’ Quarterly, volume 46, number 3, January 2017 (Thomson Reuters Canada Limited Canada Law Book), co-author
  • Fernandes v. Araujo: Vehicle Ownership, Possession and Vicarious Liability, The Advocates’ Quarterly, volume 45, number 2, March 2016 (Thomson Reuters Canada Limited Canada Law Book), co-author
  • Bullen & Leake & Jacob’s Canadian Precedents of Pleadings (Carswell, 2nd ed., 2013) co-author
  • Supreme Court of Canada Manual (Canada Law Book, 2011) co-author
  • Pro bono lawyer with Refugee Sponsorship Support Program
  • Ottawa Law Review Advisory Board member

CCH Canadian Limited Prize, Ottawa Law Review, 2010

Barry C. Scott / CP Railway Scholarship in Business Journalism, Carleton University, 2007