Photograph of Mara Lieber



  • American University, B.A. (2008) cum laude
  • St. John's University School of Law, J.D. (2014) magna cum laude


  • New York

Mara Lieber

New York
Phone: +1 212.803.4060
590 Madison Avenue, 20th Floor
New York, NY 10022-2544

Mara Lieber is an associate in Crowell & Moring’s New York office and a member of the firm’s Litigation Group.

Mara handles complex commercial disputes from pre-litigation through appeal. Her practice focuses on consumer class actions, product liability claims, complex health care matters, and disputes involving financial institutions. She has represented managed care organizations, financial institutions, insurers, and individuals in complex state and federal litigation. Prior to joining Crowell & Moring, Mara was a litigation associate at a New York law firm, where she concentrated on complex commercial, security, and bankruptcy litigation matters, as well as employment disputes.  

Representative Matters

  • Representing major automobile manufacturer in nationwide class action alleging vehicle performance defects, breach of warranty, fraud, and consumer protection claims.
  • Defending a large health insurer in multiple arbitration proceedings across the nation involving a Medicare Advantage dispute.
  • Represented large institutional investor in Texas litigation seeking to recover over $70 million in losses on certain project finance notes issued by a contractor of Petróleo Brasileiro, Inc. (Prior firm).
  • Represented a global financial services firm in the prosecution of hundreds of millions of dollars in indemnification claims against loan originators for the benefit of the firm’s creditors. In connection with that litigation, successfully opposed multiple motions to dismiss and transfer venue. (Prior firm).
  • Represented a subsidiary of the fourth-largest investment bank in the U.S. in prosecution of claims against major financial institutions and entities in their capacities as Trustees, Issuers, and/or Noteholders in connection with the termination of synthetic credit default obligations. (Prior firm).
  • Represented Connecticut-based contractor sued in New York court and successfully obtained dismissal of the action based on lack of personal jurisdiction. (Prior firm).


Admitted to practice:

  • State of New York
  • U.S. District Courts for the S.D.N.Y. and E.D.N.Y.
  • U.S. Bankruptcy Court for the S.D.N.Y.
  • U.S. Court of Appeals for the Second Circuit

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