Expertise
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Practice Areas:
- Bar Admissions:
- Education:
- Queen’s University (2023) JD
- Queen’s University (2017) MA (Political Studies)
- Western University (2016) BA (Political Science)
Details
- Bio
- Cases
- Associations
- Blog Posts
- News & Media
- Publications & Presentations
Derek Hooper (he/him)
is an associate at Lenczner Slaght.
He is developing a broad litigation practice that includes a wide range of commercial matters, including complex real estate litigation, securities disputes, and injunctions, as well as a number of employment disputes and professional liability matters. Derek previously summered and articled at Lenczner Slaght.
Before joining the firm, Derek completed his JD at Queen’s University, Faculty of Law. While in law school, Derek worked as a Student Caseworker at the Queen’s Prison Law Clinic, as Vice President of Finance of the Queen’s Law Students’ Society, and as an Associate Editor of the Queen’s Law Journal. He was also a finalist in the Queen’s Law Litigation Society Moot. Recognized for his academic achievements in law school, Derek made the Dean’s Honour List in all three years for finishing in the top 10% of his class, and was awarded Course Prizes in both Employment Law and Legal Skills.
Prior to law school, Derek gained years of experience in the banking and securities industries. He successfully completed his Canadian Securities Course and was licensed with both MFDA and IIROC respectively. He worked as a Financial Advisor at a leading Canadian banking institution where he managed a book of high-net-worth clients. He advised on all aspects of their financial portfolios, including business banking, credit borrowing, and investment planning.
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Castillo v Xela Enterprises Ltd
Counsel to the court-appointed receiver in contempt proceedings on the Commercial List. Successfully obtained a finding of civil contempt and a full indemnity costs award – both of which were upheld on appeal.
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Masters Insurance Limited v Ciccolini and Platform Insurance Management
Counsel to the new employer in a case alleging breaches of non-competition and non-solicitation covenants in an employment agreement with the plaintiff employer.
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1107051 Ontario Ltd v GG Kingspa Enterprises Limited Partnership
Counsel to Great Gulf in a large commercial dispute involving the development of two large condominium projects in the heart of downtown Toronto. Great Gulf successfully resisted the Plaintiffs’ motion to strike claims for repudiation made in Great Gulf’s counterclaim. Great Gulf also successfully resisted the Plaintiffs’ motion to amend its pleadings, and was partially successful on a motion to strike the Plaintiffs’ claim on the basis of settlement privilege.
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The Estate of Vivian Maier v Stephen M. Bulger
Counsel to the Stephen Bulger Gallery in an action for copyright infringement in fine art photographs taken by the posthumously-discovered photographer Vivian Maier.
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Counsel to a physician in a class action relating to the use of an injectable treatment.
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The Advocates’ Society
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Ontario Bar Association
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Court of Appeal Ruling Advances Funding for Gender Affirming Care
The Court of Appeal recently issued a significant decision, Ontario (Health Insurance Plan) v KS, on funding for gender affirming care. The ruling provides clarity on access to insured gender affirming procedures while leaving some questions unresolved for future consideration.
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Languishing in Langenecker? Court of Appeal Says “No More”
In Barbiero v Pollack, the Ontario Court of Appeal has departed from Langenecker v Sauve and changed the law of dismissal for delay under Rule 24.01. Where a delay is found to be both inordinate and inexcusable, that alone is sufficient to dismiss the action. Plaintiffs can no longer allow an action to languish for years and then rebut the presumption of prejudice to keep it alive.
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Contempt on the Commercial List
Court orders must be obeyed. If they are not, the consequences can be severe.
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Lenczner Slaght Welcomes 10 New Associates
Canada’s leading litigation firm continues to strengthen its talent pool with the addition of 10 exceptional associates.
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Lenczner Slaght Welcomes Summer Student Class of 2022
Canada’s leading litigation firm continues to attract top talent with the addition of 12 exceptional students.
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University of Toronto Faculty of Law's Youth Summer Program
Derek Hooper and Liza Leshchynska were invited to share their expertise at the University of Toronto Faculty of Law's Youth Summer Program. Derek and Liza will join a litigation panel to offer insights on working in litigation and the journey to becoming a lawyer.
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Mahgol Taghivand, Derek Hooper, and Madison MacKinnon served as judges at the Queen's Law Moot Society’s Inaugural Moot.
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2024 Snapshot: Through the Lens of Lenczner Slaght
Lenczner Slaght launches our 2024 Snapshot, which highlights the most significant developments, decisions, and trends in litigation from the past year across 20 areas of expertise. Reflect on 2024 and look ahead to 2025 through the lens of our expert litigators.