Lonny Rosen, C.S.
About Lonny Rosen, C.S.
Lonny Rosen, C.S. is a lawyer based in Toronto, ON and has been recognized in The Best Lawyers in Canada™ since 2014. Lonny Rosen, C.S. is recognized in the following practice areas:
- Toronto, Ontario
- Administrative and Public Law
- Health Care Law
- Privacy and Data Security Law
Current Firm: Rosen Sunshine LLP
Education: Osgoode Hall Law School, York University, LLB, graduated 1996
Location: Toronto, ON
Nearby Lawyers
M. Scott Martin is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Commercial Litigation. M. Scott, who practices law in Toronto, Ontario, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which M. Scott is held by other top lawyers in the same geographic and legal practice area.
John helps clients solve their business and personal disputes: Corporate and Commercial Litigation - Business partner and shareholder disputes, breach of contract, environmental contamination disputes, franchise disputes, debt collection, commercial tenancy disputes, construction disputes, real estate disputes, product liability, bankruptcy and receiverships Estate Litigation - Disputes between heirs/beneficiaries and executors/estate trustees Sports Law - representing amateur hockey and othe...
Danny is an accomplished trial and appellate lawyer. He leads TGF’s construction and infrastructure practices. Danny regularly acts for public and private companies in construction, lien and insurance disputes. He has litigated disputes involving mines, transit systems, highways, railway systems, tunnels, aircraft, housing and condominium developments and environmental failures. Danny has worked on cases involving some of Ontario’s most complex infrastructure projects, including m...
Wesley Ng is Head of the Technology Group and Chair of the Diversity & Inclusion Committee in the Toronto office. His practice focuses on information technology, e-commerce, and biotechnology transactions, as well as privacy related matters including compliance with Canada’s new anti-spam legislation (CASL). Wesley regularly advises on business process outsourcings, service arrangements, technology exploitation (including development, commercialization and licensing), transformation...
Christopher A. Guerreiro practises intellectual property dispute resolution and litigation, with an emphasis on patents and issues affecting the life sciences, healthcare, and other high-technology industries. Mr. Guerreiro has spent much of his career working with life sciences innovators. As a litigator and advisor, he focusses on developing dispute-resolution strategies that align with the unique interests and business objectives of clients in this space—whether through litigation or...
Daniel Condon is a top attorney recognized by Best Lawyers in the practice area(s) of Labour and Employment Law. Daniel, who practices law in Markham, Ontario, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Daniel is held by other top lawyers in the same geographic and legal practice area.
David is proud to represent the fourth generation of Mills to practice at the firm since its founding in 1884. He is a great-grandson of Alexander Mills, K.C., one of the founders of the firm, grandson of Ralph S. Mills, Q.C., and a son of J. Paul Mills, K.C. David served his articles with Mills & Mills LLP, joined the firm following his call to the Bar and became a Partner in 2006. David’s practice is focused on estate law. As an estate lawyer, David provides a comprehensive range ...
Aaron Edgar is a top attorney recognized by Best Lawyers in the practice area(s) of Trusts and Estates. Aaron, who practices law in Toronto, Ontario, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Aaron is held by other top lawyers in the same geographic and legal practice area.
Sarah not only works hard for her clients, she works smart. As a determined and skilled negotiator and litigator, she effectively gauges each unique situation and tailors her approach to be collaborative or adversarial in order to achieve the best resolution for her client. Sarah prides herself on her ability to balance attention to detail with big-picture thinking. Understanding the very serious impact that family law issues can have on people’s lives, Sarah treats every case with the ...
Dan Murdoch is a partner in the Litigation & Dispute Resolution Group and a member of the Associates Committee in the Toronto office. He is also Chair of the Firm’s Claims & Risk Management Committee. His practice focuses on class actions and complex commercial litigation. His class action practice includes securities, product liability and professional negligence. Dan has been counsel on multiple securities class actions, frequently obtaining early dismissal. His commercial lit...
Explore and Learn
2026 Best Lawyers Awards: Recognizing Legal Talent Across the United States
by Jamilla Tabbara
The 2026 editions highlight the top 5% of U.S. attorneys, showcase emerging practice areas and reveal trends shaping the nation’s legal profession.
Gun Rights for Convicted Felons? The DOJ Says It's Time.
by Bryan Driscoll
It's more than an administrative reopening of a long-dormant issue; it's a test of how the law reconciles the right to bear arms with protecting the public.
2026 Best Lawyers Awards in Canada: Marking 20 Years of Excellence
by Jamilla Tabbara
Honoring Canada’s most respected lawyers and spotlighting the next generation shaping the future of law.
How to Sue for Defamation: Costs, Process and What to Expect
by Bryan Driscoll
Learn the legal standards, costs and steps involved when you sue for defamation, including the difference between libel and slander.
Best Lawyers 2026: Discover the Honorees in Brazil, Mexico, Portugal, South Africa and Spain
by Jamilla Tabbara
A growing international network of recognized legal professionals.
How to Choose a Good Lawyer: Tips, Traits and Questions to Ask
by Laurie Villanueva
A Practical Guide for Your First-Time Hiring a Lawyer
Reddit’s Lawsuit Could Change How Much AI Knows About You
by Justin Smulison
Big AI is battling for its future—your data’s at stake.
Unenforceable HOA Rules: What Homeowners Can Do About Illegal HOA Actions
by Bryan Driscoll
Not every HOA rule is legal. Learn how to recognize and fight unenforceable HOA rules that overstep the law.
Holiday Pay Explained: Federal Rules and Employer Policies
by Bryan Driscoll
Understand how paid holidays work, when employers must follow their policies and when legal guidance may be necessary.