Our Attorneys

Photo of Peter Thompson

Peter Thompson

Licensed in New Hampshire and Maine

Peter Thompson has fought for victims of serious accidents for over 30 years and has successfully resolved thousands of cases. Last year alone, he and his legal team recovered over $20,000,000 for his clients and received U.S. News & World Report’s “Best Lawyers in America” rating. Peter has also been featured in New England SuperLawyers magazine and is “AV Preeminent” rated by Lawyers.com, a well-respected peer review organization that rates lawyers based on input from judges and other esteemed members of the legal community.

The care and attention that Peter gives all of his clients is reflected in their comments posted on Google:

Ralph graceffa Testimonial
Melanie Howard Testimonial

For Peter, to be a good lawyer, you must do more that just fight aggressively for your clients and achieve excellent results; you must also consistently address your clients’ needs and concerns in a timely manner and develop relationships based on trust and respect. His firm and its reputation have been built around this philosophy.

Attorney Thompson is also a strong supporter of non-profit organizations including the Brain Injury Association (BIA) and the Consumer Health Law Program (CHLP).

Education: Bowdoin College, B.A. University of Maine School of Law, J.D.

Professional Associations/Memberships: Maine Trial Lawyers Association, Maine State Bar Association, American Association for Justice.

Awards, Merits & Honors: U.S. News “Best Lawyers in America”, New England Super Lawyers magazine “SuperLawyer”.


Photo of Mark Dunlap

Mark Dunlap

Mark Dunlap has specialized in personal injury law for over 30 years. Mark has an “AV Preeminent” rating by Martindale-Hubbell, a well-respected peer review organization that rates lawyers based on input from judges and other esteemed members of the legal community. An AV Preeminent rating is awarded to the most outstanding lawyers in a particular field of law and is the organization’s highest possible rating. Mark has also been listed in the U.S. News “Best Lawyers in America” directory since 2008 in the area of personal injury law. Having been lead counsel in over 125 jury trials in his career, Mark is one of Maine’s most experienced and well-respected trial lawyers.

John Guy Testimonial
Nick B Testimonial

Representing clients in trials in Maine courts, the U.S. District Court for the District of Maine, and in appeals in the Maine Law Court and the First Circuit Court of Appeals, Mark has participated in the determination of a number of legal decisions that have helped to shape the course of Maine law. He has also been a member of the bar of the United States Supreme Court for more than twenty years.

Education: Bowdoin College, B.A. University of Maine School of Law, J.D.

Professional Associations/Memberships: Maine Trial Lawyers Association, Maine State Bar Association, Maine Bar Foundation (Fellow), Gignoux Inns of Courts, Cumberland County Bar Association (Past President), Cumberland County Bench/Bar Liaison Committee (Chairman), and Maine Supreme Court Advisory Committee.

Awards, Merits & Honors: U.S. News “Best Lawyers in America” (since 2008), U.S. News “Best Lawyer” (2014), and Martindale-Hubbell “AV Preeminent” rating.


Photo of Sebastian Okun

Sebastian Okun

Sebastian’s practice concentrates on representing seriously injured individuals throughout Maine and New Hampshire. He is experienced in advocating for clients with a wide range of physical and emotional damages sustained as a result motor vehicle accidents and dangerous premises conditions. Sebastian is a skilled litigator and zealous advocate, determined to obtain the best possible results for his clients and the justice they deserve. His practice is dedicated to ensuring that his clients receive fair and just compensation from insurance companies and responsible parties.

Sebastian consistently receives the highest possible ratings from our clients, as illustrated below:

Zachary Sheltra Testimonial
Scott Dillon Testimonial

While attending the University of Maine School of Law, Sebastian was the Managing Editor of the Ocean & Coastal Law Journal and worked at the Federal Defender’s Office in Portland, Maine. Out of the office, Sebastian enjoys spending time with his family, snowboarding, hiking, and exploring Maine’s beaches and mountains.

Education: University of Maine School of Law, J.D., magna cum laude, 2013
University of Colorado Boulder, B.A. Political Science, 2006

Bar Admissions: State of Maine
State of New Hampshire
U.S. District Court for the District of Maine
U.S. Court of Appeals for the First Circuit

Memberships: Maine State Bar Association
Maine Trial Lawyers Association, Board of Directors
American Bar Association

Super Lawyers badge

Client Reviews

Thank you for your efforts and hard work in resolving my case. Your leadership and initiatives were outstanding. I felt truly represented, respected and was treated with honesty and integrity. We are grateful for a positive result and grateful for the excellent teamwork!

L.D., Portland

I want to thank you and your staff for all you and they did. The professional and compassionate way my case was handled is greatly appreciated. It was a pleasure to do business with your firm and if the need ever arises I will be back in touch. Thank you again.

M.H., Bangor

I feel I was treated with respect and was always 'kept in the loop' of what was happening throughout this process. I felt that I could ask any question and always receive an honest and professional response.

K.L., Lewiston

Although this has been a difficult time, you have made this much easier by your thoughtfulness and professionalism.

M.W., Portland

I would like to thank you for all your help, and taking the time to help me understand things.

T.C., South Portland

I am very satisfied with the great people at [your office]. Especially Wendy Clark and Mrs. Mann. Very happy, very pleased. Thank you.

D.M., Arundel

I was pleased with the level of professionalism and the effectiveness of your team. This was my first exposure to 'a case' and you made the process easy for me.

M.D., Kittery

My brother is an attorney in New York. After my accident 2 years ago I asked him what firm I should go with. He researched and told me to call Peter Thompson and Associates. I followed his recommendation and am glad I did. From the opening bell they were timely, informative, professional AND WARM...

R.S., South Portland, ME

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  1. 1 Free Consultation
  2. 2 Home & Hospital Visits Available
  3. 3 Over 60 Years of Experience
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