Derek J. McCallum

Michael’s practice focuses on corporate and securities law with a focus on mergers & acquisitions. He brings significant experience in private and public offerings, including initial public offerings, strategic financings, mergers and acquisitions, corporate takeovers and reverse takeovers, and other corporate restructuring transactions, such as significant acquisitions and dispositions of assets and joint ventures. Michael advises public and private corporations and strategic inves...

Valerie Kleinman is a Senior Associate at Green and Spiegel LLP in Toronto who specializes in Citizenship and Immigration law. Valerie has significant experience working on Canadian citizenship and immigration law matters in applications including: study permits, visitor visas, LMIA-based work permits, LMIA-exempt work permits, family class applications, Federal Skilled Worker and Canadian Experience Class applications through the Express Entry System, and Provincial Nominee Program applicati...

Practices in the areas of health law, appellate litigation and commercial litigation with focuses on commercial arbitrations, business and contractual disputes, shareholder disputes, administrative and public law, tribunals and commissions, professional negligence discipline, employment disputes, and appeals Professional Achievements and Recognition Certified as a Specialist in Civil Litigation by the Law Society of Upper Canada Recognized and recommended by Lexpert as a leading lawyer in the...

Daniel Daniele practises in all areas of intellectual property law, including copyright, trademarks and patents. Mr. Daniele is also a member of the Supreme Court of Canada and appellate advocacy practice team and the recall and crisis management practice team. Mr. Daniele has particular experience in pharmaceutical patent litigation. He has acted for innovative pharmaceutical companies in proceedings under the Patented Medicines (Notice of Compliance) Regulations, patent infringement actions...

John Georgakopoulos B.Sc. (Hons.), M.Sc., LL.B., is a Partner at Willms & Shier Environmental Lawyers LLP and is a Certified Specialist in Environmental Law by the Law Society of Ontario. John resolves complex environmental legal issues for clients, uniquely drawing on his technical knowledge as a former senior environmental scientist with Ontario’s environmental regulator. John has particular expertise advising property developers, REITs, industrial manufacturers, and municipalitie...

Richard Arezes is a Partner in and the Co-Chair of WeirFoulds' Real Estate Practice Group. His practice focuses on all aspects of commercial real estate transactions, including land acquisitions and dispositions, development and financing. Richard has acted for many different clients (including lenders, private and publicly traded corporations and municipalities) on a multitude of complex real estate transactions. Richard also specializes in corporate structuring for his clients including joi...

Mark Fryer practices employment, labour (union), human rights, occupational health and safety and OMVIC law by providing both litigation and corporate/commercial advice and representation to small to large businesses, corporations, and associations. A substantial number of Mark’s clients are involved in the retail automotive industry and the logistics industry. Mark has been a partner with the firm since 2006. Click here to learn more about Mark.

Mary Jane Dykeman is a managing partner at INQ Law. In addition to data law, she is a long-standing health lawyer. Her data practice focuses on privacy, artificial intelligence (AI), cyber preparedness and response, and data governance. She regularly advises on use and disclosure of identifiable and de-identified data. Mary Jane applies a strategic, risk and innovation lens to data and emerging technologies. She helps clients identify the data they hold, understand how to use it within the la...

Michael Winterstein is a top attorney recognized by Best Lawyers in the practice area(s) of Labour and Employment Law. Michael, 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 Michael is held by other top lawyers in the same geographic and legal practice area.

M. Elena Hoffstein, FEA, has a practice focused in all areas of estate planning, family business succession planning, corporate reorganization both pre and post mortem planning. She also advises on cross border and international matters, will, trusts and marriage contracts. Elena is also a recognized leader in charity law advising both charities and donors on effective legislative, tax and regulatory matters and on tax effective charitable gifting. Elena frequently advises clients on family b...