About LexSage Professional Corporation

LexSage Professional Corporation is an international trade and sales tax law firm based in Toronto, Ontario. Cyndee Todgham Cherniak, who holds an LL.B. and LL.M., founded the firm after almost 20 years practising at Bay Street law firms in Toronto. The firm operates from the Gooderham "Flatiron" Building at 49 Wellington Street East, Suite 501, a Victorian era triangular office building in Toronto's St. Lawrence neighbourhood.

The practice divides into two areas. On the trade side, it handles anti-dumping and countervailing duty proceedings, customs and tariff classification disputes, export controls and economic sanctions, government procurement bid challenges, and matters under NAFTA, CETA and other free trade agreements and the World Trade Organization framework. On the tax side, it advises on the harmonized sales tax, GST, excise tax, and Ontario's land transfer and employer health taxes. Rather than operating as a full-service firm, LexSage describes itself as a practice that supplements other Canadian and international law firms and accounting firms that don't have this work in house. Its team includes a lawyer who was formerly senior in-house counsel at General Motors, along with an advisor to the firm who is a former Canada Border Services Agency anti-dumping investigator.

In the community

  • Cherniak chairs the Canadian Bar Association's National Sales Tax, Customs and Trade Section.
  • Cherniak chairs the American Bar Association Section of International Law's Customs Committee and is a vice chair of its International Trade Committee.
  • Cherniak is a member of Council of the Ontario Bar Association.
  • Cherniak teaches a course on Canada-U.S. trade issues as a sessional and adjunct law professor at the University of Windsor Law School, and sits on the advisory board for the joint J.D. program between the University of Windsor and the University of Detroit Mercy.
  • Cherniak has been a director of the Canada China Business Council.
  • Cherniak has been a member of the Canadian Tax Foundation since 1993 and of the Toronto Commodity Tax Study Group since the 1990s.
  • LexSage says it gives other law firms and accounting firms a way to add diversity considerations to a client team, since large corporate clients increasingly ask for diversity information in requests for proposals, by outsourcing international trade or sales tax questions to LexSage on a file by file basis.

Good to know

A person using a wheelchairAccessible parking

Where to find them

The Gooderham "Flatiron" Building, 49 Wellington Street East, Suite 501, Toronto, Ontario M5E 1C9 · 416-307-4168

Is this your firm?

Fix or remove this listing, or add a free listing badge

Something wrong with this listing? Tell us and we’ll hide it right away while we review your request, then correct it or take it down.

Add your free listing badge

Add the free LawOnline listing badge to your website. It tells visitors you’re listed in an independent Canadian lawyer directory and links back to this profile. Being listed isn’t a certification or an endorsement, and the badge doesn’t mean we’ve checked your credentials.

LawOnline.ca Canadian Lawyer Directory listing badge

Similar firms in City of Toronto

Gowling WLG

486 lawyers

Gowling WLG is an international law firm with more than 1,500 legal professionals across seven countries. Its Canadian practice, including a Toronto office at First Canadian Place, advises on business law, litigation,…

Business & Corporate LawBusiness & Corporate LawCivil Litigation & Dispute ResolutionCivil Litigation & Dispute ResolutionIntellectual PropertyIntellectual PropertyTax LawTax Law

Devry Smith Frank LLP

51 lawyers · Est. 1964

Devry Smith Frank LLP (DSF) is a full-service law firm established in Toronto in 1964, with over 155 lawyers and support staff. It has offices in Toronto, Barrie, Whitby, Midland, Collingwood, and Haliburton, and prac…

Personal InjuryPersonal InjuryFamily LawFamily LawCriminal DefenceCriminal DefenceWills, Estates & TrustsWills, Estates & Trusts

Fasken Martineau DuMoulin LLP

19 lawyers · Est. 1863

Fasken is a leading international law firm with over 900 lawyers across eight Canadian offices plus London and Johannesburg. Its Toronto office was founded in 1863, and the firm is widely recognized for its mining, en…

Business & Corporate LawBusiness & Corporate LawEmployment & Labour LawEmployment & Labour LawTax LawTax LawAdministrative & Regulatory LawAdministrative & Regulatory Law

This listing was generated by AI from public sources in August 2026. It may contain errors, and we can’t guarantee it’s accurate or complete. Before you rely on anything here, verify it on the firm’s own website. Verify licence status in the Law Society of Ontario directory ↗

How this data is compiled and checked · Correct or remove this listing