Leonie van Haeren

Leonie is a litigator at Ross Nasseri LLP with a broad civil and regulatory practice.

Leonie represents clients across a wide range of matters, including disputes involving corporate relationships, property interests, employment, and contractual rights. She has acted in claims relating to real estate transactions, shareholder and co-ownership disputes, wrongful dismissal, and the division of jointly held assets. She also represents clients in regulatory and provincial offences proceedings.

Leonie is a thoughtful and strategic litigator with strong advocacy skills and a practical approach to resolving disputes. She approaches each file with a clear focus on positioning her clients for the best possible outcome, whether through negotiated resolution or contested proceedings. She is detail-oriented, well-prepared, and brings sound judgment to the matters she works on.

Leonie has appeared in complex litigation early in her career and has secured two reported decisions within her first year of practice.

Prior to joining Ross Nasseri LLP, Leonie gained advocacy experience with the Crown Attorney’s Office, Community Legal Services of Ottawa, and Borden Ladner Gervais LLP, where she worked on a variety of litigation matters.

Leonie earned her J.D., magna cum laude, from the University of Ottawa. During law school, she held senior editorial roles with the Ottawa Law Review and led the research and authorship of Artificial Intelligence’s Impact on Legal Journals, a book published by the University of Ottawa Press. She also served as a Teaching Assistant in Criminal Law and Procedure.

Prior to law school, Leonie worked in international affairs-related roles with the federal government. She holds an M.A. in International Affairs from Carleton University’s Norman Paterson School of International Affairs, and a B.Sc. in Economics with First Class Honours from Dalhousie University, where she also earned a Certificate in Intercultural Communication. Leonie is fluent in Dutch and English.

Representative Matters

• Act for developers in civil proceedings arising from real estate transactions
• Represent directors and shareholders in disputes to enforce rights under the OBCA and CBCA
• Act for the plaintiff in a wrongful dismissal claim
• Represent a co-owner in a dispute concerning their interest in an investment property
• Act for a party in a family dispute concerning the division of jointly held real estate assets
• Represent property owners in civil and provincial offences proceedings
• Act for creditors in civil proceedings to recover outstanding debts
• Represented the owner of a $25 million commercial property in a claim for specific performance

Decisions

• Ramos v. Neves, 2026 ONSC 1675: Successfully secured an order directing a buyout of our client’s property interest at the $1.5 million highest and best use valuation, with costs awarded on a substantial indemnity basis
• Majidi v. Khoshbin, 2026 ONSC 743: Successfully obtained a $450,000 costs order following a trial involving findings of breach of fiduciary duty and oppression

• “The UK-Switzerland Financial Services Mutual Recognition Agreement: A Model for a Future UK-EU Relationship?” (2025) 59:3 J World Trade 1 (co-authored with Rambod Behboodi)
• Artificial Intelligence’s Impact on Legal Journals: Challenges and Opportunities for the Ottawa Law Review(Ottawa: University of Ottawa Press, 2025), JSTOR (co-authored with Shaarini Ravitharan, Emma Murray and Ephraim Barrera)