We represent individuals in complex and sensitive civil and criminal cases.
We Handle
About Us
At Osseiran Law, we are a small but formidable team committed to delivering strategic, resilient, and fearless legal representation. With a strong foundation in criminal defence and civil litigation, we take on complex matters involving insurance companies, financial institutions, and government actors. Whether in the courtroom or at the negotiation table, our clients benefit from the synergy between sharp legal insight, creative advocacy, and a deep commitment to justice.
We bring together decades of legal experience, international exposure, and a relentless drive to protect and assert our clients’ rights. Our boutique structure means personalized service, direct access to counsel, and a team that treats every case as a priority. What we lack in size, we make up for in results.

Principal Lawyer
Marwan is a barrister licensed in Ontario and called to the Bar of England and Wales as a UK solicitor.
Marwan has practiced criminal defence and civil litigation for over 19 years, with experience before trial and appellate courts in Ontario and as a Visiting Professional at the International Criminal Court in The Hague.
Fluent in English, French, and Arabic, Marwan is well-positioned to serve a diverse client base and navigate multilingual legal settings, both domestically and internationally.
Strategic
Relentless
Client-Focused
Results
No Charges Against Client
Dismissals
Sentencings
Day-to-Day Practice
International Law & Counterterrorism
Contact
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