About Dennis O. Shillen

Dennis O. Shillen was born in Coral Gables, Florida, where he first developed a passion for championing the rights of the underprivileged and those seriously injured by others’ negligent actions. That commitment—shaped by his background, education, and years of practice—has guided his work since he became an attorney in 1980. Concentrating exclusively on personal injury law, Mr. Shillen has advanced the rights of tens of thousands of injured victims and secured millions of dollars in compensation on their behalf. In every case he advocates for maximum recovery and pursues the best possible results for his clients.

 

Awards

Reviews for Dennis O.

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Overall Rating
Showing 1-9 of 9 client reviews from Lawyers.com
Lawyers.com Rating Snapshot
5 stars
89%
4 stars
0%
3 stars
11%
2 stars
0%
1 star
0%
What do people say on Lawyers.com?
Communication
4.9
Quality of Service
4.9
Responsiveness
4.9
Value for Money
4.8
Automobile Accidents
Posted by anonymous
December 10, 2025
Hired Attorney

I hired Dennis Shillen to represent me in a Vermont auto claim. It was a really hard time for me and my family and the only thing that made it better was Shillen Mackall Seldon & Spicer Law Office. I spoke to several injury lawyers in the area like Sabbeth Law and Harding Mazzotti, but no one compared to the level of dedication I received from Dennis. Dennis and his team are not only promoting justice, but they also truly become family. If you get hurt, there is no one better to call than this law office.

 
Automobile Accidents
Posted by Daniel
November 18, 2025
Hired Attorney

What started as a simple injury case from a motor vehicle accident in another state, became unusually complicated. Dennis handled everything, especially the complications, with utmost professionalism and careful attention to detail. One could not find a better or more trustworthy attorney. The entire staff was excellent, throughout.

General Practice
Posted by Erin
November 18, 2025
Hired Attorney

All of my experiences with Dennis have been positive! He truly cares about his clients, and getting them the justice they deserve. He also cares about the community he lives in. I highly recommend SMSS!

Workers Compensation
Posted by Justin
November 18, 2025
Hired Attorney

I was involved in a work related injury few years back and Dennis Shillen has been working with me as my legal council. I must say that Dennis puts his best foot forward and in fact was able to guide me with the best approach of handling this situation to win my case. Dennis Shillen is a fantastic lawyer and will represent you much like he did me. Dennis Shillen in my opinion is a battle tank heading straight against the defense attorney and does not like to back down. Although my injuries still are aching me every day I was able to get financially back on my feet again. Anyone that has doubts I’m telling you from firsthand that he will not want back down .

 
Workers Compensation
Posted by Mary
November 17, 2025
Hired Attorney

I had a great experience working with this firm. My initial contract was with Briana. She guided me through the process with compassion and efficiency. Briana is incredibly good at her job. I immediately felt that I had made the right choice by having this firm pursue my case. Mr. Mackall's attention to detail and genuine interest in establishing the best outcome for me gave me confidence. I felt heard. The agreement he negotiated exceeded my expectations. I am thrilled! I felt that Briana and Jim made this process easy and eliminated the stress and dread of my having to resolve this on my own.

 
Response from Dennis O.
November 17, 2025
Mary, thank you so much for such a thoughtful review. I am so glad we were able to help you feel heard!!
Personal Injury
Posted by anonymous
October 30, 2025
Hired Attorney

Dennis Shillen is one of the most talented and skilled attorneys in Vermont and New Hampshire. Nobody cares about their clients more than Dennis. He is dedicated to being there when people need him most. Shillen Mackall Seldon & Spicer Law Office is the best firm and I would pick them over and over again.

Response from Dennis O.
October 30, 2025
Thank you for your kind words. We have a terrific team here and really pride ourselves in helping injured people.
Personal Injury
Posted by anonymous
February 23, 2017
Hired Attorney

I contacted Atty Dennis Shillen because he took on GMC on behalf of my daughter & won! My best friend has a TBI & upon hiring Dennis we learned how & why GEICO was going to pay, with the assurance that it would be in less than a year and it was! Dennis handled GEICO with finesse & there were no games or hassles allowed, as taking advantage of a person with a TBI would have been "the thing to do." Although Atty Shillen will most definitely win your lawsuit, it's not about winning: It's about YOU!

 
Workers Compensation
Posted by anonymous
May 20, 2016
Hired Attorney

When I got hurt at work I didn't know what to do. I saw Dennis on TV and decided to give him a call, little did I know what a great decision that would be! Dennis and his staff were so helpful and answered all of my questions... and I had A LOT! They were able to get my claim settled much faster than I expected! I would recommend Dennis to ANYONE who gets hurt at work!

 
Workers Compensation
Posted by anonymous
May 07, 2013
Hired Attorney

Services

Areas of Law

  • Personal Injury 7
    • Automobile Accidents
    • Boating Accidents
    • Dog Bites
    • Motorcycle Accidents
    • Sexual Abuse
    • Slip and Fall
    • Wrongful Death
  • Whiplash
  • Workers Compensation
  • Black Lung
  • Other 39
    • Accidents
    • Animal Attacks
    • Aquatic Injuries
    • Automobile Negligence
    • Bicycle Accidents
    • Bodily Injury
    • Brain Injury
    • Bus Accidents
    • Carpal Tunnel Syndrome
    • Catastrophic Injury
    • Commercial Vehicle Liability
    • Cumulative Trauma
    • Electrical Injury
    • Electromagnetic Field Litigation
    • Head Injury
    • Motor Vehicle Accidents
    • Neurolaw
    • Pedestrian Injuries
    • Personal Injury Appeals
    • Personal Injury Arbitration
    • Personal Injury Mediation
    • Plaintiffs Personal Injury
    • Power Line Contact Injury
    • Psychological Injury
    • Rental Vehicle Litigation
    • Repetitive Stress Injury
    • School Bus Accidents
    • Severe Burns
    • Spinal Injury
    • Subway Accidents
    • TMJ Dysfunction
    • Third Party Wrongful Death
    • Tourist Injuries
    • Transfusion Associated AIDS
    • Traumatic Brain Injury
    • Unintended Acceleration
    • Workers Compensation Arbitration
    • Workers Compensation Appeals
    • Industrial Insurance

Practice Details

  • Languages
    English
  • Payment Information
    Payment & Cost Features
    Free initial consultation
    Contingency Fee: 33% - 40%
  • Firm Information
    Position
    Partner
    Firm Name
    Shillen Mackall Seldon Spicer & Fraas
  • Pro Bono Services

    Non-Profit Involvement: Zack's Place Developmental Center, The Homestead, The Mertins House, Woodstock Hockey and Skating Association, Pentangle Council on the Arts, Woodstock Boy Scouts, Woodstock Rotary Club, Woodstock Free & Accepted Masons.

  • Additional Links

Experience

  • Bar Admission & Memberships
    Admissions
    1980, Florida
    1980, U.S. District Court, Southern District of Florida
    1984, U.S. Court of Appeals, Second Circuit
    1985, U.S. Supreme Court
    1989, Vermont
    Memberships
    American Association for Justice
    Florida Bar Association
    Vermont Trial Lawyers Association
    Vermont and Florida Bar Associations
    Vermont Association for Justice
  • Education & Certifications
    Law School
    Howard University School of Law
    Class of 1980
    J.D.
    cum laude
    Other Education
    Florida International University
    Class of 1975
    B.A.
    with honors
  • Personal Details & History
    Hobbies & Interests
    Music - Sailing

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Attorneys FAQs

  • Is this attorney admitted to the bar in more than one state?
    Yes, Dennis O. Shillen is admitted to practice in Florida and Vermont.
  • Is this attorney admitted to practice in any U.S. Federal Courts?
    Dennis O. Shillen is admitted to practice before the United States Court of Appeals for the Second Circuit, United States District Court for the Southern District of Florida and United States Supreme Court.
  • Does this attorney maintain a professional presence on any social networks?
    Yes, Dennis O. Shillen has a professional profile on facebook and LinkedIn.
  • Is this attorney Martindale-Hubbell Peer Review rated?
    Yes, Dennis O. Shillen has a 4.7 Peer Rating from Martindale-Hubbell.
  • Is this attorney Martindale-Hubbell Client Review rated?
    Yes, Dennis O. Shillen has a 4.9 Client Rating from Martindale-Hubbell.