Zachary Proulx is a litigator who represents clients in complex commercial disputes and insolvency-related matters.

Mr. Proulx handles financial institution litigation, insolvency litigation, and other high-stakes commercial disputes in state and federal courts. He advises clients across a broad range of industries and at all stages of civil litigation.

In the complex commercial space, Mr. Proulx frequently counsels leading companies, financial institutions, and individuals in connection with:

  • Breach of contract disputes
  • Lender liability and credit disputes
  • Fraudulent transfer claims
  • Fiduciary duty claims
  • Other complex business torts

He has extensive experience in contested bankruptcy court proceedings and associated litigation. His clients in restructuring-related litigation include debtors, creditors, ad hoc lender groups, estate fiduciaries, and other stakeholders.

Mr. Proulx also maintains an active pro bono practice, focusing on immigration matters. He previously served on the firm’s Training & Career Enhancement (TACE) Committee, which develops and oversees in-house training programs for associates.

Prior to joining Latham, Mr. Proulx clerked for Judge Christopher C. Conner of the US District Court for the Middle District of Pennsylvania. Mr. Proulx graduated cum laude from the University of Michigan Law School, where he served as an executive editor of the Michigan Law Review and received the Craig Spangenberg Oral Advocacy Award.

Mr. Proulx’s representative matters include advising:

Complex Commercial Litigation

  • The British Bankers’ Association in connection with US-based benchmark interest rate litigation
  • Former directors and officers of a corporation in connection with RICO and corporate governance claims
  • National law firms in legal malpractice actions
  • An agent for a consortium of secured lenders in breach of contract and probate-related litigation

Bankruptcy Litigation & Creditors Rights

  • Libbey Glass, a leader in glass production, in its chapter 11 cases
  • GSO Capital Partners, a second lien lender and plan sponsor, in the bankruptcy of Legacy Resources
  • The Official Committee of Unsecured Creditors in the bankruptcy of Synergy Pharmaceuticals
  • An ad hoc group of secured lenders in the bankruptcy of FirstEnergy

Bar Qualification

  • New York


  • JD, University of Michigan Law School, 2012
    cum laude
  • AB, Vassar College, 2007
    Phi Beta Kappa, General Honors