Sullivan
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Biography

Keri represents stakeholders in a broad range of bankruptcy matters and related litigation. Keri is experienced in negotiating workouts, structuring commercial foreclosures and UCC sales, and enforcing creditor rights in connection with defaulted mortgages and other secured instruments.

Education
  • Western New England College School of Law (J.D., cum laude)
  • Saint Michael's College (B.A.)
Bar & Court Admissions
  • Massachusetts
  • Maine
  • New York
  • U.S. District Court, District of Massachusetts
  • U.S. District Court, District of Maine
  • U.S. District Court, Northern District of New York
  • U.S. District Court, Southern District of New York
  • U.S. Court of Appeals for the First Circuit
  • Supreme Court of the United States
Professional Qualifications
  • IWIRC, New York Network
  • American Bankruptcy Institute
Awards & Honors
  • New York Super Lawyers (2024-2026)
  • Massachusetts Super Lawyers, “Rising Star” (2016-2021)
  • U.S. Bankruptcy Court, District of Massachusetts, Pro Bono Honor Roll (2014-2019)
Community Engagement
  • IWIRC NY Board Member and Substantive Events Co-Chair
  • Leadership Council, Tina’s Wish
  • NextGen Steering Committee (Chicago 2025), National Conference of Bankruptcy Judges

Additional Publications
  • Author, State Receivership: An Alternative to Bankruptcy, ABF Journal, April 2018
  • Co-author, First Circuit Rejects Seventh Circuit’s Approach to Rejection of Trademark Licenses: Licensees Retain No Post-Rejection Trademark Rights, AIRA Journal, Vol 31 No. 4 - 201
  • Contributor, “Local Bankruptcy Rules: Massachusetts,” Thompson Reuters Practical Law (online resource), 2018-2021
Sullivan Attorneys Selected to 2026 New York Metro Super Lawyers and Rising Stars Lists
Super Lawyers has named 13 attorneys from Sullivan's New York office to its 2026 New York Metro Super Lawyers and Rising Stars lists. Attorneys are recognized for excellence in the practice of law, rated by a high degree of peer recognition and professional achievement. The recipients of this designation will be featured in New York Metro Super Lawyers magazine and The New York Times. The following Sullivan attorneys have been named 2026 New York Metro Super Lawyers: Carole Bass - Estate & Probate Keri Wintle Costello - Bankruptcy: Business Scott Kaufman - Mergers & Acquisitions Gerry Silver - General Litigation Michael Sullivan - Business Litigation Joel Telpner - Business/Corporate The following Sullivan attorneys have been named 2026 New York Metro Rising Stars: Joonas Aho - Securities & Corporate Finance Molly Depew - Estate & Probate Anna Lea (Setz) McNerney - Business Litigation Michael Palmisciano - Intellectual Property Christopher Shields - Business Litigation Zachary Sobel - Securities & Corporate Finance Ida Vanto - Mergers & Acquisitions
Sullivan Attorneys Selected to 2025 New York Metro Super Lawyers and Rising Stars Lists
Super Lawyers has named 11 attorneys from Sullivan's New York office to its 2025 New York Metro Super Lawyers and Rising Stars lists. Attorneys are recognized for excellence in the practice of law, rated by a high degree of peer recognition and professional achievement. The recipients of this designation will be featured in New York Metro Super Lawyers magazine and The New York Times. The following Sullivan attorneys have been named 2025 New York Metro Super Lawyers: Carole Bass - Estate & Probate Keri Wintle Costello - Bankruptcy: Business Scott Kaufman - Mergers & Acquisitions Gerry Silver - General Litigation Michael Sullivan - Business Litigation Joel Telpner - Business Corporate The following Sullivan attorneys have been named 2025 New York Metro Rising Stars: Anna Lea (Setz) McNerney - Business Litigation Michael Palmisciano - Intellectual Property Aaron Schleicher - Securities & Corporate Finance Zachary Sobel - Securities & Corporate Finance Ida Vanto - Mergers & Acquisitions