Derek J. McCallum

Kathryn Ball is a top attorney recognized by Best Lawyers in the practice area(s) of Health Care Law and Medical Negligence. Kathryn, 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 Kathryn is held by other top lawyers in the same geographic and legal practice area.

Dolores Barbini is a management-side labour, employment and human rights lawyer in Hicks Morley’s Toronto office. She advises employers in both the public and private sectors with respect to their union and non-union workforces. Dolores appreciates how important it is to know each client’s business and understand the uniqueness of each workplace. She understands that proactive advice, training and education can provide the most cost-effective results for clients. Dolores has appea...

Barry Segal is a tax lawyer in our Toronto office. He has a diverse tax practice that includes public and private M&A, debt restructurings, corporate finance, corporate reorganizations, structuring private equity investments, advising domestic and cross-border investment funds, and international tax planning for Canadian and foreign corporations. Barry also acts as counsel on federal and provincial tax audits and appeals.

David Tsai’s responsiveness and strategic thinking has earned him the reputation of trusted advisor for management-side clients. He prides himself on providing practical and timely advice on a wide range of labour and employment law matters. David’s practice spans unionized and non-unionized workplaces for both federally and provincially regulated employers. He has specialized expertise in advising clients on discipline and discharge, employment standards, occupational health and ...

Errol Tenenbaum is a top lawyer recognized by Best Lawyers in the practice area(s) of Trusts and Estates. Errol, who practices law in Toronto, Ontario, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Errol is held by other top lawyers in the same geographic and legal practice area. Errol Tenenbaum, Partner in the Tax and Wills & Estates Groups at Robins Appleby LLP, has over 20 years of experience advising ...

Michael was called to the bar in 1984. He joined Lyons, Arbus as an associate in 1984. Lyons, Arbus evolved into Lyons, Goodman where he made partner in 1988. When Lyons, Goodman dissolved in 1990, Michael joined the firm of Iacono Brown where he thereafter became a partner. He left Iacono Brown in October 1997 to form ZTGH. Michael has practiced exclusively in the area of insurance since 1984, both in the property and casualty field. Michael's current practice includes accident benefits work...

Patricia’s practice focuses on professional regulation and discipline, as well as labour matters, in both the federal and provincial jurisdictions. She has extensive experience providing representation to individuals in the education sector, in particular in assisting those who are facing allegations of misconduct, as well as to workers in the media sector on a wide variety of issues. Patricia represents individuals before administrative tribunals on professional misconduct and discipli...

Michael Stangarone is a partner at MacDonald & Partners LLP, where he has practiced exclusively in the area of family law since 2005. He was called to the Ontario Bar after earning his LLB at the University of Western Ontario. He regularly appears at all levels of court in Ontario, including the Ontario Court of Justice, the Superior Court of Justice and the Court of Appeal, and has developed an expertise in cases involving international child abduction. Michael’s practice includes ...

David is a trusted advisor who is known for his unique ability to cut through the noise, develop an effective strategy and achieve the desired outcome. No stranger to the courtroom, David has represented clients in numerous trials, applications, appeals, mediations and arbitrations. Although he is respected for his willingness to “fight” when necessary, clients appreciate David’s ability to recognize when a negotiated resolution best serves their interests. David’s pra...

Andreea Muth has a general corporate and commercial law practice, with a focus on business owner estate planning. She advises business owners and private corporations on the structure and implementation of corporate reorganizations, mergers and acquisitions, as well as comprehensive business succession planning. This includes will and estate planning, and the use of family trusts. Combining her unique blend of corporate/commercial law and estate planning experience, Andreea sets up structures...