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Partner
Education
2011 | J.D. – University of Ottawa
2006 | Bachelor of Arts – York UniversityAssociations
· Canadian Bar Association
· Advocates Society -
With over a decade of litigation experience, Karen J. Sanchez is a valued Partner at Gaertner Baron Professional Corporation and a respected litigator. Known for her expertise in trial and appellate advocacy, Karen is recognized for her strategic insights and meticulous preparation in navigating complex legal matters.
Karen earned her Juris Doctor (J.D.) with honours from the University of Ottawa and began her career at a leading litigation firm. She has gained extensive experience in the Ontario Superior Court of Justice, the Court of Appeal for Ontario, and the Divisional Court.
Karen’s civil litigation practice is diverse, with a particular focus on employment law and estate litigation. In employment law, Karen expertly handles disputes involving wrongful dismissal, workplace discrimination, and executive compensation. Her deep understanding of the intersection between employment law and tax issues has led to her being invited as a speaker by the Ontario Bar Association—Employment Law Section. This balanced perspective allows her to provide practical legal advice from both employer and employee viewpoints.
In estate litigation, Karen navigates disputes surrounding wills, trusts, and estates, addressing sensitive issues such as undue influence, capacity, and beneficiary rights. Her meticulous approach ensures comprehensive representation in these complex matters.
Karen’s cases have attracted media attention, underscoring the public significance of the issues she addresses. In addition to her courtroom experience, she excels in resolving disputes through negotiation and mediation, achieving favorable settlements that help clients avoid the costs and uncertainties of prolonged litigation.
Some of Karen’s notable cases include:
- Urban Lennox Gibbs v. Security National Insurance Company et al, 2025 ONSC 4656 (CanLII)
- Barker et al v. Barker, 2025 ONSC 2704 (CanLII)
- Amstar Pool LLP v. Boothe, 2024 ONSC 5613 (CanLII)
- The Estate of William Robert Waters v. Gillian Henry et al., 2024 ONSC 4190 (CanLII) and 2023 ONSC 4465 (CanLII)
- Easter v. Alexander, 2024 FC 568 (CanLII) and 2024 FC 567 (CanLII) and 2024 FCA 176 (CanLII) and 2024 FC 845 (CanLII)
- Pasandideh v. Vahidi, 2021 ONSC 5459 (CanLII)
- Welykyi v. Rouge Valley Co-operative Homes Inc., 2016 HRTO 299 (CanLII)
- Talisman v. Kyser, 2013 ONSC 6612 (CanLII)
Outside her legal practice, Karen is committed to mentoring the next generation of legal professionals. She serves on the Board of Directors of the Osgoode Cup, where she supports and guides students and young lawyers.
For an appointment with Karen, please contact her at:
Gaertner Baron Professional Corporation
119 Spadina Avenue,
Suite 604
Toronto, Ontario
M5V 2L1
CanadaPhone: 416-260-2100 x 205
Direct Line: 416-984-6304
Fax: 416-260-2700
