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Leonard F. Lesser

Business Attorney at New York, NY

5.0   9 reviews
  • State Years
    New York - NY 32 years
    Connecticut - CT 32 years
  • Licensed for 32 years
    State NY
    Acquired 1992
    Currently Registered No misconduct found
  • Licensed for 32 years
    State CT
    Acquired 1992
    Active No misconduct found

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

About Leonard

Learn Leonard’s areas of practice.

Len prosecutes and defends business litigation in federal and state courts around the country, and arbitration tribunals administered by JAMS, AAA, ICDR, FINRA, and other ADR providers. He focuses on business torts; copyright, trademark, trade secret and unfair competition claims; partnership, joint venture, shareholder, and LLC member disputes; corporate transaction, post-closing, and busted deal disputes; contract and UCC disputes; financial services litigation; securities litigation; insurance disputes; real estate disputes; and employment litigation. He also prosecutes and defends toxic tort, product liability, premises liability, and personal injury claims.


Recent trial victories include a Court confirmed multimillion-dollar arbitration award and judgment against an oil and gas tycoon in a complex joint venture dispute, and subsequent contempt judgment against the judgment debtor for violation of an antisuit injunction, affirmed on appeal with appellate attorneys' fees and costs awarded. L&R Exploration v. Grynberg, 927 N.Y.S.2d 816 (Sup. 2011), aff'd,90 A.D.3d 538, 934 N.Y.S.2d 707 (1st Dep't 2011); see also Grynberg v. L&R Exploration Venture, 261 P.3d 731 (Wyo. 2011).


In Asset Management Associates of New York, Inc. v. Emerson Telecommunication Products, LLC, 08-cv-2128 (U.S.D.C., E.D.N.Y.), Len successfully represented the seller of telecommunication products businesses in defense of post-closing claims asserted by the buyer, including claims that seller misrepresented the value of inventory as part of the sale. After defeating the buyer's claim for fraud based rescission of the entire transaction, as well as the agreement's arbitration provision (Asset Mgmt. Assocs. v. Emerson Telcom. Prods. LLC, 08-CV-2506, 2011 U.S. Dist. LEXIS 9434 [E.D.N.Y., Jan. 25, 2011]), the dispute was arbitrated in 2013 before a forensic accounting examiner. The Arbitrator ultimately rejected the buyer's claims for $3.9 million and found in favor of seller on its claims for a post-closing adjustment. On January 9, 2014, the Court entered Judgment against the buyer for $1.9 million.


Recent defense verdicts include Marchetti v. Branson Ultrasonics Corp., Case No. 126010929 (CT Sup. Ct., Danbury), where Len obtained a defense verdict after jury trial in May of 2014 on behalf of a global developer, manufacturer, and distributor of plastic joining, industrial cleaning, and ultrasonics processing equipment. The plaintiff claimed she suffered traumatic brain injuries and other damages resulting from an accident on the defendant's property. After trial, the Court granted directed verdict to the defense on 3 of 5 counts, and the jury then rendered a defense verdict on the two remaining counts.   Other recent appellate victories include Gray v. Denny's Corp., No. 12-4278-cv, 2013 U.S. App. LEXIS 18437 (2d Cir., Sep't 5, 2013)(reversing summary judgment awarded to Denny's restaurants on tort claims asserted by a patron who was criminally assaulted by a group of other patrons); Flores v. Velez, 111 A.D.3d 599, 974 N.Y.S.2d 134 (2d Dep't 2013)(reversing preclusion order in a case claiming negligent supervision of a church volunteer who allegedly committed sexual misconduct); Lisbey v. Pel Park Realty, 99 A.D.3d 637, 952 N.Y.S.2d 882 (1st Dep't 2012)(reversing summary judgment awarded to a building owner in connection with claims asserted by a tenant who was injured by a celing collapse); Spielman v. Grace Gospel Church of Suffolk, Inc., 77 A.D.3d 816, 910 N.Y.S.2d 105 (2d Dep't 2010), leave denied, 17 N.Y.3d 703, 929 N.Y.S.2d 94 (2011)(reversing denial of motion to dismiss claims asserted against a Church in connection with alleged adult sexual misconduct by a pastor); and Yeshiva Ohr Torah Community School, Inc. v Zurich Am. Ins. Co., 78 A.D.3d 686, 910 N.Y.S.2d 517 (2d Dep’t 2010)(reversing summary judgment awarded to an indemnitor in connection with the claims of indemnitee and its subrogee for reimbursement of defense costs).


Other reported decisions include: NML Capital, Ltd. v. Republic of Argentina, 727 F.3d 230 (2d Cir. 2013); Stein v. KPMG, LLP, 486 F.3d 753 (2d Cir. 2007); Freedom Card, Inc. v. JP Morgan Chase & Co., 432 F.3d 463 (3d Cir. 2005); Ehrens v. Lutheran Church, 385 F.3d 232 (2d Cir. 2004); Berkovitz v. Home Box Office, 89 F.3d 24 (1st Cir. 1996); Floyd v. Liechtung, 10-cv- 4254, 2013 U.S. Dist. LEXIS 41729 (S.D.N.Y. 2013); In Touch Concepts v. Cellco P'ship, 13 Civ. 1419, 2013 U.S. Dist. LEXIS 80249 (S.D.N.Y. 2013); Wilson v. Austin, 11-cv-4594, 2013 U.S. Dist. LEXIS 89191 (E.D.N.Y. 2013); Emerson Electric Co. v. Asset Management Associates of New York, Inc., 08-cv-1489, 2012 U.S. Dist. LEXIS 39442 (E.D.N.Y. 2012); First Roumanian American Congregation v. GuideOne Mutual Ins. Co., 862 F. Supp. 2d 293 (S.D.N.Y. 2012); Wilson v. Austin, 11-cv-4594, 2012 U.S. Dist. LEXIS 123067 (E.D.N.Y. 2012); WNET, et al. v. Aereo, Inc., 871 F. Supp. 2d 281 (S.D.N.Y. 2012); Asset Mgmt. Assocs. v. Emerson Telecom. Products, LLC, 08-cv-2506, 2011 U.S. Dist. LEXIS 9434 (E.D.N.Y. 2011); Gary Friedrich Enterprises v. Marvel Enterprises Inc., 08 Civ. 1533, 2011 U.S. Dist. LEXIS 30685 (S.D.N.Y. 2011); Leibowitz v. Aternity, Inc., 10-cv-2289, 2010 U.S. Dist. LEXIS 70844 (E.D.N.Y. 2010); Kruse v. Wells Fargo Home Mortg., Inc., 02-cv-3089, 2006 U.S. Dist. LEXIS 26092 (E.D.N.Y. 2006); United States v. Stein, 452 F. Supp. 2d 281 (S.D.N.Y. 2006); Pitts v. Allied Interstate, Inc., 04-cv-3151, 2004 U.S. Dist. LEXIS 22646 (S.D.N.Y. 2004): Freedom Card, Inc. v. JP Morgan Chase & Co., 333 F. Supp. 2d 239 (D. Del. 2004); Axcelis Technologies, Inc. v. Applied Materials, Inc., 01-10029, 2003 U.S. Dist. LEXIS 9908 (D. Mass. 2003); Baxter Diagnostics, Inc. v. Novatek Med., Inc., 94-cv-5220, 1998 U.S. Dist. LEXIS 15093 (S.D.N.Y. 1998); State Wide Photocopy, Corp. v. Tokai Fin. Servs., 909 F. Supp. 137 (S.D.N.Y. 1995); Brown v. General Instrument Corp., 93-cv-7907, 1995 U.S. Dist. LEXIS 5472 (S.D.N.Y. 1995); Braun v. Abbott Laboratories, 895 F. Supp. 530 (E.D.N.Y. 1995); In re GT Brands Holding LLC, 05-15167, 2005 Bnkr. LEXIS 2807 (Bnkr. S.D.N.Y. 2005); Young v. Brown, 2014 N.Y. App. Div. LEXIS 337 (2d Dep't 2014); East Midwood Jewish Ctr. v CNA Ins. Co., 72 A.D.3d 877, 898 N.Y.S.2d 662 (2d Dep’t 2010);Desena v. Federated Dept. Stores, Inc., 65 A.D.3d 662, 884 N.Y.S.2d 765 (2d Dep’t 2009); Hernandez v. Bethel United Methodist Church of N.Y., 49 A.D.3d 25, 853 N.Y.S.2d 305 (1st Dep’t 2008); Thompson v. Steuben Realty Corp., 31 A.D.3d 746, 820 N.Y.S.2d 285 (2d Dep’t 2006); Dowd v. Alliance Mortgage Co., 32 A.D.3d 894, 822 N.Y.S.2d 558 (2d Dep't 2006); L&R Exploration Venture v. Grynberg, 804 N.Y.S.2d 286 (1st Dep’t 2005); L&R Exploration v. Grynberg, 271 P.3d 530 (Colo. App. 2011); Simon v. Mehryari, 16 A.D.3d 664, 792 N.Y.S.2d 543 (2d Dep’t 2005); Corneroli v. Borghi, 11 A.D.3d 409, 783 N.Y.S.2d 572 (1st Dep’t 2004); Robinson v. Viacom Int'l, 242 A.D.2d 481, 663 N.Y.S.2d 817 (1st Dep’t 1997); R.C. Layne Constr. v. Stratton Oakmont, 228 A.D.2d 45, 651 N.Y.S.2d 973 (1st Dep’t 1996); Amico v. Graphic Arts Leasing, 231 A.D.2d 596, 647 N.Y.S.2d 815 (2d Dep't 1996); Tierney v. Frey, 2012 N.Y. Misc. LEXIS 4056 (N.Y. Sup. 2012); Priya Hospitality LLC v. Patel, 2011 N.Y. Misc. LEXIS 2768 (N.Y. Sup. 2011); Egar v. Congregation Talmud Torah, 23 Misc. 3d 1111A, 885 N.Y.S.2d 711 (N.Y. Sup. 2009).


Simon Lesser PC
100 Park Avenue
16th Floor
New York, NY, 10017

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5.0 / 5.0
  9 customer reviews
5 Star
4 Star
3 Star
2 Star
1 Star
Posted by Jeff | February 3, 2023
This review is from a person who hired this attorney.
| Hired Attorney
Exceptional and Passionate Litigator
Len is a great corporate litigation attorney and a pleasure to work with. He is very knowledgeable, practical, and passionate. He represented us with energy and enthusiasm, and gave us sage advice the whole way through, which resulted in an excellent outcome for our company. I wouldn't turn to anyone else.
Posted by bruce | October 3, 2014
Review by Loeb Holding Corp
I have been in business for 46 years and spent the first 26 as a lawyer in private practice Thus I am extremely seasoned in the context of understanding the complexities of the litigation practice both as a practitioner and as a client. Mr Lesser is amongst the best litigators I have worked with in my entire career. I can recommend him without reservation to anyone seeking superb advice both outside and inside the courtroom.
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Posted by anonymous | May 31, 2014
Outstanding Business Representation
Len was outstanding in solidifying our recent jury trial defense verdict. His professionalism and attention to detail left the jury with no other option but to agree with the reasoning of our case. Len left no stone unturned and was even able to convince one of the plaintiff’s own witnesses to agree with a key point in our case. Our company will not settle and in the end, the plaintiff got nothing. After all, my company did not contribute to the plaintiff’s irresponsibility. And in today’s society, that is reassuring. Believe me, I hope we never get into a situation like this again. But if we do, I will make sure Len is our attorney. As a business leader in a Fortune 200 company, I highly recommend Len Lesser. SWL
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Posted by Brian | April 1, 2014
Exceptional Legal Counsel
I have worked with Len for the past 7 years on a series of litigation and arbitration disputes related to a corporate divestiture. The process has been complex and very unique due to the opposing party's irrational behavior. Through the process Len has counseled us through all the dynamics involved to get to the conclusion. Len provided excellent legal counsel yielding very positive results. Personally as a business leader in a Fortune 200 company, I have enjoyed working with Len. Len’s professionalism, attention to detail and exceptional ability to explain the intricacies of the prevailing law and court practices has allowed us to plan and prepare the required support materials in a timely fashion in our otherwise very busy schedules. I would highly recommend Len Lesser and we will use him again. BGM
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Posted by Patel | March 17, 2014
Great Attorney for Complex Business Disputes
Len Lesser was instrumental in helping us build a rock solid case in our lawsuit against a then Partner. The case was very intricate and needed to be handled very diligently as it involved serious accusations as well as millions of dollars in assets. Len Lesser's strong case against the defendant(s) eventually lead us to a very favorable settlement. Len is always available for advise and is very straightforward. He confidently gave us his unbiased advice every step of the way, which was very helpful in making complex business decisions.
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Posted by John | February 25, 2014
Len Lesser's partnership with Sports Information Group / Daily Racing Form LLC
During my five-year tenure as CEO of Sports Information Group / Daily Racing Form LLC, Len Lesser has served as the Company's senior legal counsel and has consistently performed at the highest and most professional level. As outside counsel, Len has successfully led SIG's labor-related negotiations, facilitated contract and arbitration resolutions, managed M&A transactions, and overseen protection of our copyright/trademark and IP, to name a few areas in which Len has helped steer. Len brings deep experience across multiple areas of law, a balanced viewpoint, attention to detail, and a sense of urgency to getting the job done. I view Len as a trusted member of SIG's executive team and cannot recommend him more highly. JJH
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Posted by Private Equity Firm | February 9, 2014
Strong Recommendation from Private Equity Firm
We started working with Len five years ago on a litigation defense matter that Len successfully resolved for one of our portfolio companies, and since then our relationship with Len has expanded to include work for four of our portfolio companies, as well as some work for the Fund itself. The range of legal matters that Len has handled for our companies includes litigation, arbitration, purchase agreements, general corporate matters, and employee contracts and matters. We absolutely and unreservedly trust Len in every matter that he handles for our firm and our portfolio companies, and he has earned the complete confidence of each of our investment professionals and senior portfolio company executives that he has worked with. Len’s judgment and advice are always on point and his diligence, preparation and execution are superb. We have been particularly impressed with Len’s execution in litigation matters – his judgment on whether we are on the better side of the argument has always proven to be correct and his tremendous execution in the courtroom has helped our companies achieve some spectacular victories in both litigation and arbitration against large and well-known companies and law firms. In addition, Len unfailingly has our best interests at heart – at all times, he is motivated by helping our companies achieve the best and most economically beneficial outcome possible. Since we were founded 15+ years ago, we have worked with many attorneys, some of whom have hourly rates that are double Len’s rates, and we now use Len on the majority of the litigation matters that our portfolio companies encounter because Len is the best general litigator we have worked with.
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Posted by seymour | February 6, 2014
Knowledgeable Litigator
Len, is a very savvy and professional attorney, and got to the heart of my issues very quickly. His expertise and experience were very evident though every step of the settlement discussions, which in the end, allowed me to avoid litigation. As a result of my initail experience with him, I have asked him to represent me again in another matter.
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Posted by Boston Infrastructure Investments, Inc. | January 30, 2014
Wholeheartedly recommend Len Lesser & Associates
Len Lesser legal advice and services were instrumental in helping us resolve a complex trans-national dispute involving U.S. and Mexican courts. For our company, the case was a major issue that required quick grasp of complex precedents both in the U.S. and Mexico and navigating in cross-jurisdictions without negatively affecting proceedings begun by our firm in either country. Mr Lesser designed a compelling strategy that simplified to our advantage our case in front of U.S. courts while providing comfort and guidance to our Mexican lawyers. Through his expertise, legal efforts, and good guidance, we were able to reach adequate settlement with our counterpart -in spite of them being a financial Goliath. We fully recommend Mr. Lesser as a trusty and knowledgeable lawyer determined and devoted to his clients.
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  • Free Consultation 60 minutes
Payment methods
Cash, Check, Credit Card


AVVO RATING 9.5 (Superb)

Work Experience

  • Principal
  • Simon▪Lesser PC
  • 2006 - Present
  • Partner
  • Goodwin Procter LLP
  • 2001 - 2006
  • Partner
  • Schneck Weltman & Hashmall LLP
  • 1998 - 2001
  • Associate
  • Schneck Weltman Hashmall & Mischel LLP
  • 1994 - 1998
  • Associate
  • Rivkin Radler Bayh Hart & Kremer
  • 1991 - 1994
  • Intern
  • United States Senator Alfonse M. D'Amato
  • 1988 - 1989
  • Intern
  • International Commission of Jurists
  • 1986 - 1987
View all work experience


  • American University, Washington College of Law
  • JD - Juris Doctor
  • 1991
  • George Washington University
  • BA - Bachelor of Arts
  • 1988

Sample of Legal Cases

  • Asset Management Associates of New York, Inc. v. Emerson Telecommunication Products, LLC, 08-cv-2128 (U.S.D.C., E.D.N.Y.).
  • $1.9 million Judgment
  • CB Richard Ellis, Inc vs. Daily Racing Form, LLC, Index No. 112466/210 (NY Sup., NY Co.).
  • Dismissal
  • Nimir v. Nassau Health Care, No. 8943/08 (Nassau Sup. 2012):
  • Settled
View all legal cases


  • American Bar Association
  • Member
  • N/A
  • New York City Bar
  • Member
  • N/A
  • Association of Trial Lawyers of America
  • Member
  • N/A
  • Association of Surfing Lawyers
  • Member
  • N/A
View all associations

Languages Spoken

  • English

Honors and Awards

  • Copyright Lawyer of the Year - New York
  • Corporate INTL Magazine
  • 2015
  • New York - Metro
  • Super Lawyers
  • 2014
  • Copyright Lawyer of the Year - NY
  • Corporate INTL Magazine
  • 2014
  • Copyright Lawyer of the Year - New York
  • ACQ (Acquisition Finance) Magazine
  • 2014
  • Recognition
  • Super Lawyers - NY Metro
  • 2013
  • Copyright Lawyer of the Year, NY, USA
  • Global Law Experts
  • 2013
  • Recognition
  • Super Lawyers - NY Metro
  • 2012
  • Recognition
  • Super Lawyers - NY Metro
  • 2011
  • Recognition
  • Super Lawyers - NY Metro
  • 2010
  • Recognized
  • Super Lawyers - NY Metro
  • 2009
  • Recognized
  • Super Lawyers - NY Metro
  • 2008
View all awards

Attorney endorsements

Received (5)
Given (2)
Endorse Leonard
Litigation Attorney | Dec 22
Relationship: Worked together on matter
"I have teamed with Len on a variety of litigation matters for over 20 years. There is no better ally to have on your side in a contested matter than Len. I highly recommend Len and his firm."
Litigation Attorney | Feb 04
Relationship: Worked together on matter
"I endorse this lawyer. Len is an experienced and capable trial and appellate lawyer, quick thinking on his feet, and has a comfortable and confident courtroom presence in front of the judge and jury. He possesses the outstanding intellect, sound grasp of civil procedure, and broad experience to expertly handle almost any matter in litigation."
Litigation Attorney | Jan 30
Relationship: Worked together on matter
"I have worked with Len for ten plus years on numerous complex matters in Connecticut. He is a highly skilled and conscientious litigator. Len knows how to aggressively litigate and to use his expertise in a manner designed to achieve the best possible results for clients. I highly recommend him."
Litigation Attorney | Jan 29
Relationship: Worked together on matter
"Len is a consummate professional, a commerical litigator of the highest calibre and a zealous, effective and practical advocate for his clients. I would recommend him any any important business issue."
Litigation Attorney | Mar 01
Relationship: Other
"I endorse this lawyer."

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New York Business Lawyer Leonard F. Lesser
Leonard F. Lesser
Business Attorney
New York, NY
Licensed for 32 years
Free Consultation