Leslie Brown

Sean M. Sullivan is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Commercial Litigation and Insurance Law. Sean M., who practices law in Kitchener, Ontario, has been recognized since 2022. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Sean M. is held by other top lawyers in the same geographic and legal practice area.

Tom Hunter is a partner in the firm's Waterloo Region office and practises in the area of corporate, commercial and technology law. He also serves as co-chair of the Firm's National Technology Law Practice Group and is the former department head of the Waterloo Region Business Law Group. His particular areas of focus include assisting entrepreneurs and owner operators with startup and growth oriented companies, mergers and acquisitions, financing and all aspects of technology commercialization.

Louis Frapporti is a partner in the the firm's Hamilton office. His practice covers a wide range of areas including product liability and insurance litigation, negligence and other tort actions, contractual disputes, and appellate advocacy. Following his call to the bar in 1992, he served a two-year appointment as a clerk to the Chief Justice of Ontario. In addition to his role as an advocate, Louis has occupied a number of management and administrative positions within the firm, including Ch...

A Partner in the firm, Sheryl joined Sullivan Mahoney LLP in 2019. In her employment practice, Sheryl provides timely strategic advice and perspective on all aspects of the employment relationship provincially and federally, including recommending and assisting in implementing effective measures to expediently manage and proactively address all types of workplace issues, negotiations and disputes. This includes negotiating executive compensation packages and employment contracts; drafting and...

Jane’s practice focuses exclusively on advice and advocacy to public and private sector employers in all areas of workplace law. Jane represents both union and non-union clients. Jane has extensive experience assisting clients in addressing labour law, employment law, human rights and disability management matters. She regularly advocates for clients during labour relations disputes, collective bargaining, interest arbitration and grievance arbitrations. She also regularly represents cl...

Allen Wynperle is a top attorney recognized by Best Lawyers in the practice area(s) of Personal Injury Litigation. Allen, who practices law in Hamilton, Ontario, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Allen is held by other top lawyers in the same geographic and legal practice area.

Laura Dickson is a top attorney recognized by Best Lawyers in the practice area(s) of Personal Injury Litigation. Laura, who practices law in Hamilton, Ontario, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Laura is held by other top lawyers in the same geographic and legal practice area.

Jordan Diacur is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Commercial Litigation. Jordan, who practices law in Hamilton, Ontario, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jordan is held by other top lawyers in the same geographic and legal practice area.

Jean Leonard focuses on real estate in her corporate and commercial law practice. Jean represents clients in all aspects of real estate law including purchases, sales, land development, secured lending transactions, and commercial leases. Jean works for and with municipalities in relation to land-development matters including subdivision and site plan approvals, expropriations, and land-use planning. Jean also has a depth of experience in corporate and commercial matters including incorporati...

Carl Peterson is a partner of the firm and since his call to the bar in 1984, he has worked in all areas of labour law with special expertise in the construction industry and health and safety litigation. In addition to defending employers against health and safety charges, he has been quite active in developing policies and seminars for employers to prevent accidents and avoid litigation. Carl has a great deal of experience in assisting non-union and union employers develop positive employee...