About Michael J. Sullivan

Michael focuses his practice on complex commercial litigation, and seeks to achieve practical, efficient, and successful outcomes for his clients. He represents businesses and individuals across a wide variety of industries, both as plaintiffs and defendants, in connection with all manner of business-related disputes and claims, including business breakups, breach of contract, fraud, breach of fiduciary duty, business torts, statutory violations, and similar claims. In addition to his commercial practice, Michael has represented clients in a wide variety of matters involving complex factual and legal issues, including in securities litigation, labor disputes, environmental litigation, real estate litigation, and sexual harassment cases. He has also represented clients in connection with federal and state criminal and regulatory investigations, state administrative proceedings, enforcement proceedings, and internal investigations. Michael practices in both federal and state courts, where he has tried several cases, and has represented clients in administrative and regulatory proceedings, and in alternative dispute resolution venues.

​Prior to joining Spiro Harrison, Michael was an associate with Dechert LLP and Sills Cummis & Gross P.C.


  • Fordham University School of Law – J.D.
  • Loyola College – B.A., English


State Bars:

  • New Jersey
  • New York

U.S. District Courts:​

  • District of New Jersey
  • Eastern District of New York
  • Southern District of New York

Memberships & Associations

  • New Jersey State Bar Association
  • New York State Bar Association
  • Monmouth County Bar Association
    • Courthouse Facilities Committee
  • Christian Brothers Academy
    • Alumni Association – Board of Trustees