John P. Mullen Law Office

About John P. Mullen Law Office

John P. Mullen Law Office is a solo commercial litigation practice based in Mississauga, Ontario. The office is run by lawyer John Mullen, who was called to the Ontario Bar in 1978 after earning a B.A. from York University and an LL.B. from Osgoode Hall Law School. The practice concentrates on construction, commercial, employment, estate, and real estate litigation, acting for clients that range from sole proprietors and family owned businesses to financial institutions and multinational corporations.

On the construction side, the firm has represented suppliers, equipment rental companies, subcontractors, general contractors, owners, and lenders in disputes over liens and contract claims. Its commercial litigation work has included shareholder, franchise, and partnership disputes, along with cases interpreting commercial leases and agreements for the purchase and sale of property. In employment matters the firm acts for both employers and employees on wrongful dismissal claims and disputes over non-competition and non-solicitation clauses, and its estate litigation practice covers contested wills, the interpretation of wills and trusts, and questions of mental incapacity or undue influence.

Mullen has also instructed on business law at Sheridan College and at Wilfrid Laurier University, and has taught bar admission and continuing education courses for the Law Society of Upper Canada.