Susan Mitchell

Susan Mitchell

Managing Partner

Law Clerks:
Jennifer Wilson

Crystal Murphy


Susan proudly hails from North Bay, Ontario and continues to provide legal services in Northern Ontario as well as Eastern Ontario.

Susan began practicing in 2002 and has been a Partner at Tierney Stauffer LLP since 2007. She became Managing Partner in 2018. Susan practices Civil Litigation, specializing in Personal Injury Law, Medical Malpractice, and Insurance Law.

Susan is an active member of the County of Carleton Law Association (CCLA), the Ontario Trial Lawyers Association (OTLA) and the Stormont, Dundas and Glengarry Law Association (SDGLA).

Susan spent a number of years as Chair of the New Lawyers and Articling Students Continuing Legal Education Committee and has spoken at numerous educational programs for the CCLA and Advocates Society. Susan has also been a guest speaker at the Annual CCLA Solicitors Conference and Litigators Conference as well as a guest lecturer at the University of Ottawa Faculty of Law.

Susan is general counsel to the Canadian Society of Forensic Scientists and is a past member of the Fundraising Committees for both the Brain Injury Association of the Ottawa-Valley and the Charity Golf Tournament Committee for St. Patrick’s Home Foundation.

Susan is a member of the Women’s Business Network (WBN) and is on the Board of Directors for, and an active volunteer with the FAMSAC Emergency Food Cupboard in Bells Corners.

In addition to providing legal services to clients through our offices in Cornwall, Kingston, Arnprior and Ottawa, Susan provides services to clients in North Bay, Sudbury, New Liskeard and surrounding areas.


  • University of Windsor, LL.B., 2001
  • McMaster University, B.A. (Psychology), 1995


  • The Law Society of Ontario
  • The County of Carleton Law Association
  • The Advocates Society
  • Ontario Trial Lawyers Association
  • Stormont, Dundas and Glengarry Law Association


I came to Tierney Stauffer when I was involved in a car accident in 2014. My family and I are extremely grateful for all the work Susan Mitchell did for us over the course of years. We are incredibly pleased with the outcome of our case and I wouldn’t hesitate to recommend Susan Mitchell or anyone from Tierney Stauffer in the future. – N.L.

My family engaged Tierney Stauffer LLP to handle a case of grave assault on my brother over 6 years ago. At a time where my entire family was engrossed in deep grief, this law firm represented by the duo of Susan Mitchell and Lesly Joseph were absolute rock stars. They guided us throughout, avoiding legal pot holes that could mar our case. As the other party tried to cause unnecessary delays, these lawyers persisted, using calculated pressures as the occasion demanded to press forward.

My family and I are extremely grateful and will always recommend these lawyers to anyone for these reasons:

    1. They were always within reach to tackle any questions we had about the case.
    2. Their genuine empathy and understanding of the grief the family was going through…this proved to be extremely important!!!
    3. Resisted in a subtle manner any attempts to prolong the case unnecessarily.
    4. Even after a settlement was reached, their long reach to the officers at Health Canada and other institutions helped us negotiate favourable terms.
    5. Their methodical approach to the entire case gave us a water tight schedule and a good understating of what to expect at each milestone
    6. Finally, both Susan Mitchell and Lesly Joseph exhibited great professionalism throughout the case.


I had a slip and fall injury that resulted me being off work for more than 2 years. Valin Partners Lawyers in North Bay recommended Susan Mitchell to us. Susan travelled to North Bay to meet us and discuss my case. Susan negotiated a settlement with North Bay Township. We found her to be extremely professional and handled things in a timely matter. Both Susan and her staff were always willing to explain things to us. Susan and her staff are 5 star in my books!!!! – W.L.

After surviving a hit and run, Susan Mitchell provided excellent service, thorough explanation and advice, in a professional and timely manner.  The patience and service I received is truly appreciated and made my experience less overwhelming. Tierney Stauffer LLP: A firm worth hiring! – K.A.

Susan, Donna and Catheryn did an awesome job getting the settlement that I needed after my major car accident. These gals really know what they are doing!! Thanks for explaining things for me, all through the process! – C.C.

Eight years ago I was in an MVA in Ottawa. I knew nothing about the rehab that would follow nor the complications of multiple insurance companies all having responsibilities due to the brain injury and chronic pain that resulted. Susan Mitchell (Jen and others on the team) not only dealt with legal matters for me and my family but Susan became my advocate and led the way to gain support from three insurance companies, rehab companies and other providers that helped me along the way. For discovery sessions, settlement negotiations, etc. Susan prepared me well, walked me through the steps as they occurred and always took the time to make sure I understood the status of various matters. Susan kept my life moving forward and for that I am forever grateful. – E.M.

I had Susan Mitchell as my lawyer and I thought the service provided was excellent. All procedures were clearly explained, questions were always answered expediently and professionally. I would highly recommend this firm. – L.C.

The law firm was recommended to me at a stage when I was in bad shape following a RTA. At a point where my family and I did not even know what I needed moving forward. Susan Mitchell and her team were very helpful in advising me how to get immediate help and also on how to get set up with ongoing care. As such I was able to focus on recovery. When it came time to negotiate for my settlement, they made the process much less stressful than I had expected and were able to get me a generous settlement. I am very satisfied with this law firm. – J.G.

We will always be grateful for the help and guidance Susan Mitchell gave us after our son was in a car accident. He suffered a traumatic brain injury and the loss of two of his friends. Susan always explained things to us and him in terms that we understood. At the time we had no idea how much help he would need or where to get it. Again Susan made sure the right care was given to him which at times took a lot of work on her behalf. She and Jennifer kept in regular contact with us and always answered our questions. – M.R.

When our daughter got hit by a car, we were dealing with the horrific details of how her life was altered. The entire team at Tierney and Stauffer made the situation easier to deal with. Specifically, Jennifer and Susan Mitchell who were a real blessing to our family. They genuinely looked out for my daughter’s best interest. They reached out to her regularly to see how she was doing. They were very comforting to us. All in all, this is a law firm I was really impressed with. They prepared us for every step of the way and that was huge for us. I would recommend this law firm to anyone and everyone. – N.D.

We are very thankful for the professional knowledgeable and informative service we received from Susan Mitchell and her team. Having initially decided to approach Tierney Stauffer based on the positive reviews we read, we reached out and engaged their services and were not disappointed. Thank you very much. – A.H. and M.H.

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