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About me

Mr. Madsen was trained as an attorney by some of the most accomplished individuals and prestigious establishments of our country’s legal profession.


Mr. Madsen obtained a Bachelor of Arts from Cornell University, graduating with distinctions in all subjects and Phi Beta Kappa. He attended Cornell Law School, where he was an Editor to the Cornell Law Review. Upon graduation, cum laude, Mr. Madsen served as a law clerk to the Honorable Ursula Ungaro, United States District Judge for the Southern District of Florida. He assisted and advised the Judge on all aspects of a 150-case civil docket, which covered diverse issues such as civil rights, contract, employment, admiralty, intellectual property, securities and tort law.

        After his clerkship, Mr. Madsen joined Davis Polk & Wardwell in New York, and litigated cases involving issues of fraud, corporate liability and defamation, among others. He subsequently joined the boutique firm Cohen & Gresser LLP, where he further refined his skills as a litigator.

Mr. Madsen then joined the United States Attorney’s Office in the Southern District of New York, and represented the United States government in federal court in over one hundred civil cases covering a wide array of regulatory, constitutional, medical malpractice, tort, tax, employment discrimination, and bankruptcy issues.

Mr. Madsen is a native speaker of French and Haitian Creole, fluent in Spanish, with working knowledge of German. He is admitted to the State Bar of New York, and to the courts of the Southern and Eastern Districts of New York, as well as the Court of Appeals for the Second Circuit.  Mr. Madsen is a member of the American Bar Association, the New York State Bar Association, and the New York City Bar Association.


Languages spoken: English, French, Spanish, Creole

Practice areas


  1. International Law: 50%
  2. Litigation: 30%
  3. General Practice: 10%
  4. Contracts: 10%

Attorney endorsements

2 total 

Are you an attorney? Endorse this lawyer

  • Joshua Scott Bauchner

    I endorse this lawyer. Bertrand is an exceptionally competent attorney who vigorously pursues and defends his clients' interests.


    Joshua Bauchner Litigation Attorney
    Relationship: Fellow lawyer in community

  • Andrew Scott Buzin

    The client is Bertrand Madsen's first and foremost priority. Bertrand is a compassionate and passionate advocate on behalf of his clients, and his acumen as a commercial litigator is evident in each stage of the legal process. I whole-heartedly endorse him.


    Andrew Buzin Medical malpractice Attorney
    Relationship: Worked together on matter

Contact info


1115 Broadway
11th Floor
New York, NY, 10010


NYCurrently registered 200307/10/2016
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Work experience
TitleCompany nameDuration
PartnerMADSEN LAW P.C.2013 - Present
Adjunct ProfessorBenjamin N. Cardozo School of Law, Yeshiva University2011 - Present
Assistant U.S. AttorneyU.S. Attorney's Office, SDNY2009 - 2013
AssociateCohen & Cohen, LLP2006 - 2009
AssociateDavis Polk & Wardwell2004 - 2006
Law ClerkHon. Ursula Ungaro, USDJ2002 - 2004
Association namePosition nameDuration
New York City Bar AssociationN/AN/A
American Bar AssociationN/AN/A
New York State Bar AssociationN/AN/A
School nameMajorDegreeGraduated
Cornell Law SchoolLawJD - Juris Doctor2002
Cornell UniversityN/ABA - Bachelor of Arts1998
Speaking engagements
Conference nameTitleDate
Benjamin N. Cardozo School of Law, Yeshiva UniversityContract Drafting2015
Benjamin N. Cardozo School of Law, Yeshiva UniversityContract Drafting2014
Benjamin N. Cardozo School of Law, Yeshiva UniversityLegal Research & Writing2013
Benjamin N. Cardozo School of Law, Yeshiva UniversityLegal Research & Writing2012
Benjamin N. Cardozo School of Law, Yeshiva UniversityLegal Research & Writing2011