About Jacques Semmelman

A former Assistant US Attorney in the Eastern District of New York, Jacques Semmelman delivers for his clients by tapping into his significant courtroom experience. He is known for deftly handling complex cases — including those involving quantitative, econometric, scientific and engineering issues — by leveraging his mathematical and scientific background that includes a PhD from Harvard.

Speaking the clients' language

Jacques works with clients through all phases of civil and criminal litigation and arbitration, as well as in the defense of government investigations and enforcement proceedings. He is an accomplished trial lawyer, having served as lead counsel in more than 25 jury and bench trials and arbitral hearings, and is a skilled appellate advocate, having argued 16 appeals.

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Practice Focus

  • Commercial litigation and arbitration
  • Hatch-Waxman and other pharmaceutical patent litigation
  • Lanham Act litigation
  • Antitrust litigation
  • Fraud and breach of contract litigation
  • Product liability defense
  • FCPA compliance and investigations
  • OFAC sanctions compliance and investigations
  • White collar criminal defense
  • International extradition

Representative Experience

  • Served as expert witness on OFAC sanctions in proceedings before the International Commercial Arbitration Court at the Chamber of Commerce and Industry of the Russian Federation. *
  • Served as expert witness on US extradition law on behalf of the Attorney General of British Columbia in criminal case in British Columbia, Canada. *
  • Served as expert witness on New York law in litigation in Thailand. *
  • Commercial Litigation and Arbitration
  • Served as lead arbitration counsel for claimant Asian pharmaceutical company in licensing and marketing dispute with US-based multinational pharmaceutical company; obtained eight-figure arbitral award for client, as well as substantial award of legal fees. *
  • Served as lead counsel for a US generic pharmaceutical company in Hatch-Waxman litigation against UK-based multinational pharmaceutical company; case settled on very favorable terms. *
  • Served as lead counsel for Australian pharmaceutical company in defense of shareholder derivative and class action litigations in Delaware Court of Chancery revolving around majority ownership of US public company engaged in drug development; case settled on very favorable terms. *
  • Served as lead counsel for plaintiff chain of US department stores in Lanham Act injunction action against major US retailer; obtained injunction via summary judgment, as well as full award of legal fees. *
  • Served as lead counsel for international sports federation in defense of antitrust claims; case against client was dismissed voluntarily after completion of discovery. *
  • Served as lead trial counsel for contractual beneficiary of $331 million winning bid in US Bankruptcy Court case involving challenge brought by competing bidder seeking to reopen auction based on alleged collusion; following trial, court found no collusion and approved the transaction. *
  • Represented international trading company as co-counsel in multi-defendant proposed class action involving alleged antitrust conspiracy to elevate metal prices; class certification was denied and summary judgment granted dismissing class action case. *
  • Represented Swiss banker arrested in Germany and held for extradition to US on tax fraud and related charges; extradition was denied by German court. *
  • Represented businessman under criminal investigation in the Southern District of New York for alleged corrupt payments to Mexican government officials; no charges brought. *
  • Conducted internal investigation on behalf of Latin American bank into potential OFAC sanctions violations; no charges brought. *
  • Conducted internal investigation on behalf of European manufacturing company into potential OFAC sanctions violations; no charges brought. *
* Experience prior to Katten

Publications

Quick Reads

Presentations and Events

  • April 12, 2022
    US, EU, and UK Sanctions Imposed Against Russia: What Every Business Should Know Right Now Webinar
  • February 3, 2016
    The Knowledge Congress Live Webcast Series | Anti-Corruption Compliance and Enforcement: Key Developments in 2016 & Beyond
  • November 6, 2015
    Mexican Mediation Institute Program | The Long Arm of the U.S. Foreign Corrupt Practices Act