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Timothy J. Dennin

Arbitration Attorney at New York, NY

5.0   5 reviews
  • State Years
    New York - NY 39 years
    Massachusetts - MA 39 years
  • Licensed for 39 years
    State NY
    Acquired 1984
    Currently Registered No misconduct found
  • Licensed for 39 years
    State MA
    Acquired 1983
    Active No misconduct found

We have not found any instances of professional misconduct for this lawyer.

About Timothy

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Timothy J. Dennin, P.C.
270 Madison Avenue
9th Floor
New York, NY, 10016
Timothy J. Dennin, PC
316 Main St
Northport, NY, 11768-1766
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5.0 / 5.0
  5 customer reviews
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1 Star
Posted by Ed | May 29, 2017
This review is from a person who hired this attorney.
| Hired Attorney
Straightest Path from Problem to Resolution
"Tim" Dennin has the experience, proven skill set, and track record to assess, understand, and lead the charge in achieving the best results to protect investors. Tim is highly communicative and very open to share ideas in developing the strategy for the best way forward. All of my dealings with Tim have been fair, honest, and direct. Tim leads clients on the straightest path from problem to resolution. I do not hesitate in recommending Tim Dennin. He is simply the best in protecting the rights of investors.
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Posted by anonymous | December 19, 2016
This review is from a person who hired this attorney.
| Hired Attorney
My first experience with an American lawyer
This was my first experience with an American attorney, in fact with any attorney. I researched the internet and consulted my American friends with legal background (two retired lawyers) before contacting Mr Dennin. At the outset I was impressed by his approach, which was encouraging: rigor of his questions, logic in reasoning. Later I learned one of his basic principle that "preparation is everything", which I particularly liked. Mr Dennin spend enough time to research all relevant material of the case. On that basis he was in a position to prepare legal papers that were comprehensive and specific and supplemented by facts and most relevant legal precedents. He took time to outline and explain to me legal proceedings, and consulted with me - in person, on the phone, via e-mail - on all important matters. He presented me with copies of legal papers which allowed me to follow rather lengthy development of the case. Mr Dennin's legal strategy was realistic and results oriented. This was particularly evident during a mediation event. He was always available for me if I wanted to contact him. I think that we have established a very good communication. Being represented by him made me fill assured and comfortable. As a person, I have found him a pleasant, courteous and ready to listen. As a professional, he has vast experience spread over many years and success in defending rights of his clients. All in all I think that Mr Dennin is a kind of attorney which I would recommend with full conviction.
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Posted by Dolly | November 17, 2016
This review is from a person who hired this attorney.
| Hired Attorney
Timothy J Dennin is the BEST!
Our former broker, financial consultant, is in jail until 2025. We realized we were in deep financial trouble after losing our entire life's savings to the lies and deceptions of our broker. A very close friend of ours, who also had also retained Tim and had used the same broker, gave us Timothy J Dennin's name. This "gentle" man was so helpful to us, we honestly did not know where/how to start a claim. Tim's patience with us on the telephone was unbelievable. There were times when my husband was so distraught, I honestly did not know what to do with thousands of pieces of correspondence & fake statements! So, what did I do? I called Tim Dennin and he always gave me the knowledge and strength to forge ahead. He gave our case 150%, and was successful in recouping money from a large brokerage firm. We have one more Arbitration Case, and, again, hired Tim Dennin to represent us. He is professional in every way. And, did I mention honesty? One of my first telephone conversations with Tim was, "honesty, honesty, honesty"---we can't have any "I think" or "I believe". His reputation is respected by all.
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Posted by LM | November 7, 2016
This review is from a person who hired this attorney.
| Hired Attorney
Favorable outcome
If you have the misfortune to need a lawyer who specializes in security litigation, there really is only one choice, Tim Dennin. My family and I were embroiled in a situation in which a broker we entrusted put us in the middle of a fraudulent investing scam that totally devastated our life. We hired Tim who worked tirelessly for over 3 years with very positive results. How I would describe Tim is: honest, hard working, extremely intelligent and relentless. He is a man of means and resolve.
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Posted by Jonathan | October 31, 2016
This review is from a person who hired this attorney.
| Hired Attorney
Won judgement for our family on broker malfeasance
I strongly recommend Mr Dennin. He took on a fairly difficult case and won for our family a very good judgement. He was thorough, prepared, and properly aggressive on our behalf. He utilized all the facts and documentation in a very effective way. He walked us through the process and the risk/reward issues of each step in the process. We appreciated his efforts and the results.
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Contact for Details


AVVO RATING 9.3 (Superb)

Work Experience

  • Founding Partner
  • Timothy J. Dennin, PC
  • 1990 - Present
  • Senior Associate
  • Lowy Dannenburg
  • 1989 - 1990
  • Enforcement Attorney
  • United States Securities & Exchange Comm.
  • 1987 - 1989
  • Assistant D.A.
  • Nassau County District Attorney's Office, Ny
  • 1983 - 1987
  • Law Clerk
  • U.S. Attorney's Office, Sdny
  • 1982 - 1983
  • Law Clerk for Hon. George Pratt
  • United States District Court, Edny
  • 1982 - 1983
  • Law Clerk Appellate Division Second Department NY
  • Chamber of Judge Gibbons
  • 1982 - 1982
View all work experience


  • St John's University School of Law
  • JD - Juris Doctor
  • 1983
  • College of the Holy Cross
  • BA - Bachelor of Arts
  • 1978
  • St Johns University
  • N/A

Legal Cases

  • Lead Trial Lawyer
  • won


  • Association of the Bar of New York City
  • Member
  • N/A
  • New York State Bar Association
  • Member
  • N/A
  • National College of District Attorney
  • Member
  • N/A
  • Public Investors Arbitration Bar Association
  • Member
  • N/A
View all associations

Honors and Awards

  • AV Preeminent Rated
  • Martindale-Hubbell
  • 2022
  • Super Lawyer
  • Super Lawyers
  • 2022
  • Super Lawyer
  • Super Lawyers
  • 2021


  • Securities Arbitration (PLI)
  • "Chopping the Chop Shop"
  • 1997
  • St. John's Law Review
  • "The Ramifications of U.S. v. Vogel Fertilizer"
  • 1983

Speaking Engagements

  • trying a market manipulation case
  • 2007

Attorney endorsements

Received (3)
Given (1)
Endorse Timothy
Securities and investment fraud Attorney | Dec 09
Relationship: Fellow lawyer in community
"I endorse Tim because he is a conumate professional and colleague, great to work with."
Securities offerings Attorney | Dec 07
Relationship: Fellow lawyer in community
"I have known and worked with Tim Dennin for over 20 years. His hundreds of satisfied clients are a testament to his abilities as a preeminent practitioner in the areas of securities fraud and investor rights. I wholeheartedly endorse and recommend him to any victimized investor seeking the recover of monetary losses due to the improper conduct of a financial adviser."
Securities and investment fraud Attorney | Dec 07
Relationship: Worked for lawyer
"I endorse this lawyer. Tim and I are former colleagues at the SEC. We also have a personal friendship. We have worked on a number of cases together in private practice, all with excellent results."
Securities and investment fraud
New York Arbitration Lawyer Timothy J. Dennin
Timothy J. Dennin
Arbitration Attorney
New York, NY
Licensed for 39 years