About Joseph J. Mamounas

With nearly 20 years of experience, Joe is a trial lawyer who passionately advocates for his clients to win. As Co-Chair of the International Arbitration Group, his hyperfocus on the endgame has recovered hundreds of millions of dollars for plaintiffs in business-to-business disputes, and also avoided hundreds of millions more in liability through defense victories.

Joe’s versatility in court, arbitration, and the boardroom, combined with his practical business sense and extensive language capabilities, has helped him leverage efficient strategies to address his clients’ toughest challenges. In every engagement, Joe is a relentless champion for his clients, using discovery and other investigative tools to achieve their strategic and business objectives.

Joe’s trial practice includes extensive experience in three primary areas:

•Mergers and acquisitions, private equity, and related disputes, including claims under representations and warranties insurance (RWI) policies;
•International arbitration and litigation, with a particular focus on Latin America, Spain, and Asia and across multiple fora and arbitral institutions such as ICC and ICDR; and
•Domestic complex commercial disputes, primarily in bet-the-company fraud, contract, and class action matters across a wide array of industries and jurisdictions.

Recognition & Leadership

Awards & Accolades

•Listed, The Legal 500 Latin America Guide, Latin America: International
•International Arbitration, 2026
•City Focus: Miami, 2022, 2024-2026
•Listed, Best Lawyers in America guide, International Arbitration - Commercial, 2021-2026
•Listed, Benchmark Litigation, “Litigation Star,” 2022-2026
•Listed, Latin Lawyer, “Latin Lawyer 250 - Practice Recognition: Arbitration,” 2022-2026
•Team Member, Global M&A Network’s Americas M&A Atlas Awards, “Latam Deal of the Year” for Quinto Andar acquires Navent Group, 2023
•Listed, Florida Super Lawyers Magazine, 2018-Present
•Listed, Daily Business Review, “Professional Excellence Rising Star Award,” 2016
•Listed, Florida Super Lawyers Magazine, “Rising Star,” 2012-2017

 

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Services

Areas of Law

  • Litigation
  • Other 7
    • Trial Practice
    • M&A and Private Equity Dispute Resolution
    • International Arbitration
    • Latin America Practice
    • Arbitration & Mediation
    • White Collar Defense & Investigations
    • Asset Recovery & Fraud Remediation

Practice Details

  • Languages
    English
    Spanish
    French
    Greek
    German
  • Payment Information
    Accepted Credit Cards
    American Express
  • Firm Information
    Position
    Shareholder
    Firm Name
    Greenberg Traurig, LLP
  • Representative Cases & Transactions
    Cases
    Experience: Mergers & Acquisitions, Private Equity,
    Related Disputes: Act for a buyer as to ICC arbitration for the seller's refusal to close a cross-border pharmaceutical deal valued at USD $500 million, resulting in an eight-figure USD damages payment to our client.
    Act for a private equity portfolio company in Florida
    Delaware courts as to a services dispute arising from transactions valued at approximately USD $500 million in the health care space.
    Act for a buyer as to claims in Delaware court for fraudulent representations
    warranties by the seller in connection with a USD $450 million transaction in the electronics industry.
    Act for a seller in securing an injunction in ICC emergency arbitration which prevented the buyer from terminating a cross-border deal in the technology space valued at USD $165 million.
    Act for numerous insureds in making claims under RWI policies across various industries, recovering upwards of USD $100 million for our clients.
    Act for a seller in ICC arbitration for specific performance to require a buyer to close a cross-border technology transaction, resulting in payments approaching USD $200 million to our client.
    Act for a private equity seller as to breach, specific performance,
    other claims in Delaware court arising from a USD $115 million transaction in the technology-services industry.
    Act for a private equity buyer as to claims in Delaware court for fraudulent representations
    warranties by the seller in relation to a USD $100 million manufacturing transaction.
    Act for a private equity portfolio company in the trucking industry in Virginia
    California courts, defeating USD $70 million in liability
    recovering the client's legal fees
    costs.
    Act for an insurance carrier as to claims brought by a private equity buyer in AAA arbitration arising from a USD $40 million deal in the trucking industry, defeating alleged coverage grounds.
    Act for a buyer in ICC arbitration as to fraud claims against the seller arising from a USD $20 million aviation transaction, resulting in full satisfaction of the client's losses following trial.
    Act for a private equity buyer in JAMS arbitration against sellers for breached representations
    warranties, recovering nearly 50% of the purchase price in a diagnostics-industry deal.
    Act for a family office portfolio company in the school supply business in securing in Ohio court the attachment
    return of more than USD $10 million in inventory.
    Act for a seller in defeating USD $10 million claims in Florida court for breach of contract arising from a cross-border technology deal, resulting in a multimillion-dollar judgment for our client.
    Act for a technology-focused private equity fund as to a major investor's claims in Florida court, yielding a resolution of no liability
    payment to our client of its legal fees
    costs.
    Additional International Arbitration
    Litigation Matters: Act for an international fertilizers manufacturer in prosecuting claims in ICDR arbitration in relation to mining rights valued at more than USD $100 million, resulting in a favorable resolution.
    Act for a global pharmaceutical distributor, as licensee, in prosecuting an ICC arbitration arising from a China/U.S. licensing dispute valued at more than USD $80 million.
    Act for a global pharmaceutical distributor, as licensee, in prosecuting an ICC arbitration arising from a China/U.S. licensing dispute valued at approximately USD $40 million.
    Act for a global ink manufacturer as plaintiff in pursuing cross-border claims including fraud
    product liability valued at more than USD $25 million in New Jersey court.
    Act for an international water infrastructure provider as to a USD $15 million ICDR arbitration
    related Florida court proceedings, resulting in full dismissal of our client from the dispute.
    Act for an international medical-device manufacturer in Florida court as to a distribution dispute involving alleged damages exceeding USD $10 million.
    Act for a global services conglomerate in prosecuting claims in Florida court for breach of fiduciary duty, conspiracy,
    aiding
    abetting, resulting in a multimillion-dollar judgment after trial.
    Act for an international investment finder as to a contractual dispute in Florida court involving damages which are alleged to exceed USD $5 million.
    Additional Trial Work in Domestic Complex Commercial Disputes: Act for one of the world's largest financial institutions in defending in Florida court against contractual breach claims valued at approximately USD $20 million.
    Act for a minority shareholder in AHLA arbitration
    related Florida court actions arising from a shareholder dispute, resulting in a USD $15 million award for our client following trial.
    Act for one of the world's largest financial institutions as plaintiff in pursuing multimillion-dollar contract
    related claims against various parties in Florida court.
    Act for a publicly traded mortgage REIT in prosecuting misrepresentation claims in Connecticut court, resulting in payment to our client of more than double its actual damages.
    Act for a publicly traded telecommunications hardware provider in Florida court as to claims against a global telecommunications provider, resulting in payment to our client of about USD $5 million.
    Act for a global ink manufacturer in Florida court in defending multimillion-dollar claims, ultimately securing a dismissal with prejudice without any payment or liability admission by our client.
  • Additional Links

Experience

  • Bar Admission & Memberships
    Admissions
    2007, Florida
    Memberships

    Professional & Community Involvement

    •Past Co-Chair, American Bar Association (ABA) Section of International Law, International Mediation Committee
    •Alumni Board Member, University of Miami Law Review
    •Federal Bar Association
    •Miami International Arbitration Society
    •The Florida Bar, Business Law Section and International Law Section
    •The Florida Bar, International Litigation and Arbitration Conference, Steering Committee

  • Education & Certifications
    Law School
    University of Miami School of Law
    J.D.
    cum laude
    Other Education
    Cornell University
    A.B.
    summa cum laude
  • Personal Details & History
    Age
    Born in 1982
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Attorneys FAQs

  • What year was this attorney first admitted to the bar?
    Joseph J. Mamounas was admitted in 2007 to the State of Florida.
  • How many attorneys are in this law firm?
    Greenberg Traurig, LLP has 2750 attorneys at this location.
  • What law school did this attorney attend?
    Joseph J. Mamounas attended University of Miami School of Law.
  • What year was this attorney's law firm established?
    Greenberg Traurig, LLP was established in 1967.