Mary Grosso, B.A., LL.B.

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P: 905-522-8002 ext. 107

I started my legal career in 1994 as a student at a full-service law firm in Toronto and as a young lawyer was quickly drawn to litigation. Developing my work as a civil litigator ever since, I have appeared with success at all levels of court in Ontario. Born and raised in Hamilton, it has been a pleasure to return my practice to serve the Hamilton community since 2009.

Professional Qualifications

  • 1996 – Admitted to the Bar of the Law Society of Upper Canada

  • 1994 – Baccalaureate of Laws degree, University of Western Ontario

Membership and Affiliations

  • Hamilton Law Association, Trustee

  • Hamilton Law Association, Chair, Continuing Professional Development Committee

  • Ontario Trial Lawyers Association
  • The Advocates’ Society

  • Hamilton Medical-Legal Society

  • Ontario – Canadian Bar Association

“Learning about, getting to the heart of, and appreciating the unique qualities each individual brings to the table, is important to me in all of my personal interactions with people. I am thankful for how our practice introduces me to new people with new experiences. I am fortunate to be able to learn from others while I advocate for them, so they can try to recover their best and unique selves as much as possible after dreadful accidents and losses.”

– Mary Grosso

When You’re Injured, We Fight For You.

Mary, Just a quick note to thank you very much for the outstanding work you did representing me. Your intelligence and understanding was truly amazing and helped me remain confident through a trying time. Your hard work and dedication will always be remembered. I wish you all the best in your future endeavours. Thanks once again,


To Mary: Thank you for your dedication to my case, I’m grateful for the outcome. Best regards,


Thank you and Mary and everyone else at the office. You have all been wonderful and very helpful through this ordeal. I appreciate all the long work and hours put into helping me. Thanks again.


Mary… I just wanted to express my gratitude for your efforts in dealing with my lawsuit. You were professional and efficient , as well as personable and thorough… Again, thank you for all your work and perseverance…


Dear Ms Grosso, Too often in life the only feedback that is given is negative. I wish to change that.  From our first meeting I felt a sense of relief in knowing that I had secured excellent representation.  You were organized, and systematic in your investigation into my injuries.  You provided me with a clear explanation of what I should expect during the process. You and your team at Grosso Hooper Law kept me abreast of all communications from the insurance company.  At each step of the negotiations you made sure to explain my options, and inquire about any developments in the status of my injury.  At the end of the day, you billed fairly and fulfilled all my expectations 100%.   As a lawyer myself, it felt so good to be treated as professionally as I treat my own dear clients.  I have no hesitation in recommending Grosso Hooper Law to my friends, family and acquaintances.  With sincere thanks and gratitude.


Our Team of Experts

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Mary Grosso, B.A., LL.B.

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Kimberly Jossul, B.Sc. (Hons), LL.B.

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Robert Hooper, B.A., LL.B.

Winning Record

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Sexual Assault Ruling

Mary Grosso recently won the Court’s agreement that a plaintiff client in a sexual assault case did not have to give records related to his financial situation to the defendant.

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Lexfund v. Ferro

Mary Grosso advocated successfully for a group of clients who the Court found were unfairly treated by two different parties during the process of seeking compensation for their injuries.

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Alenezi v. Um Financial Inc.

After a mortgage company for no reason refused to advance funds just before the client’s house purchase closed, Mary won the case for the client against the mortgage company.

In the News

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Mary Grosso – 2020 OTLA Cup

Grosso Hooper Law proudly sponsors the 2020 OTLA Cup. Mary Grosso and other lawyers from the Ontario Trial Lawyers Association volunteer their time each year to support the development of trial skills, civility and professionalism amongst law school students by organizing the OTLA Cup.

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Hooper Law is now Grosso Hooper Law – Hamilton ON

Hooper Law Offices is becoming Grosso Hooper Law. This change is to reflect how Rob and Mary Grosso have worked together for their clients’ rights over the past years and how they will continue to fight collaboratively to make a difference in the lives of their clients and their clients’ families going forward.

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OTLA – Lexfund v. Ferro

These breaches of the Act by Lexfund “were not technical; they went to the very heart of the reason for the Act coming into force”. Justice Sloan held that there was actual prejudice to the borrowers in this case.

Book Your FREE Consultation

For a free consultation with our personal injury lawyers, please contact us today. We will answer your questions and help you understand what’s involved in the process. Consultations can be in person, by phone or by video call. Our office is in Hamilton Ontario and we provide services throughout Southern Ontario.

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    Our offices are centrally located in downtown Hamilton, comfortable, wheelchair friendly and with free parking. If you cannot make it to our office, we will come to your home, hospital or any other location that is convenient for you.