Firm Profile

Cassels LLP


Scotia Plaza, Suite 2100
40 King Street West
Toronto, ON M5H 3C2

Firm Details

Cassels Brock is a leading provider of legal services to Canadian and international clients. With a complement of more than 200 lawyers in Toronto and Vancouver, the firm offers a full range of sophisticated business transaction and advisory services. The firm’s nimble platform allows it to work effectively with organizations of all sizes and types and to handle domestic and international engagements of every nature and complexity. The firm’s lawyers make it a point to understand their clients’ business objectives, listen to their needs and stay up-to-date on the issues that affect their industries and markets. Through creative strategies and proactive advice, the firm helps to seize opportunities and overcome challenges.

Depending on clients’ specific needs, resources are drawn from various practice areas to ensure that matters are completed with maximum efficiency. The breadth of the firm’s services allows lawyers to work effectively with a wide range of companies – from entrepreneurial start-ups to mid-market enterprises to global corporations. Additionally, it means they can handle files ranging from tax advice for the small business owner to cross-border mergers and multinational class action lawsuits.

In addition to Best Lawyers, many of the firm’s lawyers have been recognized by Canadian, American and international publications including Chambers Global, the Canadian Legal Lexpert Directory, the Lexpert/American Lawyer Guide to the Leading 500 Lawyers in Canada, and Who's Who Legal. Cassels Brock has also been ranked amongst the top Canadian firms in the league table results for mergers and acquisitions activity and equity offerings published by Bloomberg and Thomson Financial.

The firm has acted on deals honoured at the Canadian Dealmakers’ Gala every year since its inception, and has represented winners at the Canadian General Counsel Awards annually since 2008.

Many of the firm’s lawyers have worked as executives at some of Canada’s largest companies, as top-level elected officials and civil servants, and have served as board members for many private and public organizations. Their real world experience can often make all the difference between a good result and a great result.

International Work

The firm’s extensive North American and international experience helps lawyers to assist their clients in taking advantage of national and global opportunities. Cassels Brock’s lawyers have represented a wide variety of clients, both Canadian and international, whose business affairs have crossed borders. International clients include major franchisors, mining companies, manufacturers, suppliers to Canadian companies, Canadian suppliers to international companies, multi-nationals with branches in Canada, and companies wishing to list their stock on Canadian or international stock exchanges.

Some examples of the firm’s work include:
  • Representing the world’s largest research-based pharmaceutical company in the sale of its consumer healthcare business for US$16.6 billion
  • Acting for a Swedish oil and gas production company on its acquisition of an upstream oil and gas company with exploration and producing interests in Russia
  • Acting for one of the leading intermediate gold producers in over US$1 billion of acquisitions of mines and mineral projects in Brazil, Argentina, Honduras, Nicaragua and Panama
  • Acting for North America’s third largest gold producer on its acquisition of a gold mining operation in Mexico
  • Representing Canadian steel producers in many major steel products cases


Mark Bennett
Managing Partner
John Tsiofas
Chief Operating Officer
Deborah Glatter
Director of Practice Excellence - Advancement & Career Development
Patricia Southern
Chief Financial Officer
Peter Wismath
Director of Marketing and Business Development

Top Listed State Awards

  • Top Listed in Ontario, Canada in Mining Law with 8 lawyers
  • Top Listed in Ontario, Canada in Natural Resources Law with 11 lawyers

Top Listed City Awards

  • Top Listed in Toronto in Mining Law with 8 lawyers
  • Top Listed in Toronto in Natural Resources Law with 11 lawyers

Firm Practice Areas

  • Aboriginal Law
  • Administrative and Public Law
  • Advertising and Marketing Law
  • Asset-Based Lending Practice
  • Aviation Law
  • Banking and Finance Law
  • Biotechnology Law
  • Class Action Litigation
  • Commercial Leasing Law
  • Construction Law
  • Corporate and Commercial Litigation
  • Corporate Governance Practice
  • Corporate Law
  • Education Law
  • Entertainment Law
  • Equipment Finance Law
  • Franchise Law
  • Information Technology Law
  • Insolvency and Financial Restructuring Law
  • Insurance Law
  • Intellectual Property Law
  • International Trade and Finance Law
  • Leveraged Buyouts and Private Equity Law
  • Mergers & Acquisitions Law
  • Mining Law
  • Municipal Law
  • Natural Resources Law
  • Privacy and Data Security Law
  • Product Liability Law
  • Project Finance Law
  • Public Procurement Law
  • Real Estate Law
  • Securities Law
  • Sports Law
  • Structured Finance Law
  • Tax Law
  • Technology Law

Firm News & Media

Featured Publications

Office Locations





Calgary, AB

Bankers Hall West, Suite 3810

888 3rd Street SW

Calgary, AB T2P 5C5



Get Directions

British Columbia

British Columbia

Vancouver, BC

HSBC Building, Suite 2200

885 West Georgia Street

Vancouver, BC V6C 3E8



Get Directions



Toronto, ON

Scotia Plaza, Suite 2100

40 King Street West

Toronto, ON M5H 3C2



Get Directions