Best Lawyers in America, Ones to Watch 2022 badge, Nathaniel R.B. KoslofNate has experience in a wide range of complex commercial litigation matters, including representing various parties in contract, trust, property, real estate and insolvency-related disputes in both State and Federal court. Nate has represented clients at each stage of the litigation process, from pre-suit negotiations to trial. He has also argued before the United States Court of Appeals for the Second Circuit on a post-conviction habeas appeal. 

Nate's bankruptcy practice includes the representation of debtors, financial guarantors, indenture trustees, creditors and shareholders in Chapter 11 cases and out-of-court restructurings. In his role as special litigation counsel, Nate has prosecuted hundreds of adversary proceedings concerning preferential transfers and/or fraudulent conveyances, and has successfully resolved these matters through mediation or otherwise.

Nate is Co-Chair of Sullivan's Associates Committee.

Nate is also dedicated to providing pro bono services and volunteering in the local community. In his partnership with the Victim Rights Law Center, he regularly represents victims of domestic violence and has helped his clients obtain several 209A and 258E restraining orders, including a lifetime order. He also volunteers for the Breast Cancer Research Foundation, including at their annual Boston Gala and Hot Pink events, and for Tina's Wish as a member of their Boston NextGen Group. Tina's Wish is a charity founded in 2008 in memory of the Honorable Tina Brozman, former chief justice of the SDNY Bankruptcy Court who died two years after being diagnosed with ovarian cancer.

Representative Client Work

Litigation Representative Matters:
  • Represented a global real estate company in a dispute concerning the company’s purchase of a >$50 million property in Everett, Massachusetts
  • Represented certain high-net-worth residents of a coastal Massachusetts town in a dispute over the scope of any public easements across their property
  • Represented an individual in a property dispute concerning the sale of a $16 million parcel of land in Brookline, Massachusetts
  • Represented a professional athlete in high-profile trademark litigation in Federal Court
  • Represented an NFL player in his charge of unfair labor practices before the National Labor Relations Board against the NFLPA and his former team
  • Represented a professional athlete in an action in the United States District Court for the Southern District of California involving allegations that his trainer, without informed consent, injected him with a prohibited substance, leading to his suspension and other damages
  • Represented an incarcerated individual with respect to his Habeas petition pursuant to 28 U.S.C. § 2255, including a three-day evidentiary hearing before the Unites States District Court for the District of Alaska
  • Represented private investment company and won summary judgment in the United States District Court for the Southern District of New York to recover approximately $2 million owed under a breached loan agreement
  • Represented the plaintiff in a multi-defendant, three-week bench trial in Massachusetts state court concerning allegations of usurious lending, wrongful foreclosure and other unfair and deceptive actions in violation of Chapter 93A
  • Represented the defendant in a multi-plaintiff, two-week bench trial in New Hampshire state court concerning the scope of easement rights
  • Represented the defendant in a jury trial in the Dorchester Division of the Boston Municipal Court concerning allegations of reckless/negligent operation of a motor vehicle
  • Represented a media company in its efforts to collect from an insolvent contract counterparty, achieving a favorable resolution based on a novel theory of principle/agent liability
  • Represented parents in child abduction and Hague Convention cases in Federal Court
Bankruptcy Representative Matters:
  • Served as first chair in Bankruptcy Court trial seeking declaration of nondischargeability pursuant to Section 523(a)(6) of the Bankruptcy Code
  • Represented Purdue Pharma L.P. and its subsidiaries as special conflicts counsel in their Chapter 11 cases
  • Represented Newmark Group, Inc. in its acquisition of Knotel, Inc. as part of Knotel’s Chapter 11 case
  • Represented Wilmington Savings Fund Society, FSB, as administrative agent and collateral agent, with respect to the restructuring of a $1.65 billion secured term loan to Covia Holdings Corporation and its affiliates ("Covia") in connection with Covia’s chapter 11 bankruptcy cases filed in the United States Bankruptcy Court for the Southern District of Texas
  • Represented the Term Loan Administrative Agent and Collateral Trustee with respect to nearly $1 billion in secured loans in connection with the Chapter 11 filings of issuer Foresight Energy, certain of its affiliates and its parent company, Murray Energy Corporation
  • Represented CQS (US) LLC in the Chapter 11 cases of Windstream Holdings, Inc. and its subsidiaries
  • Represented 21st Century Oncology Holdings, Inc. and its subsidiaries as post-effective date bankruptcy counsel in their Chapter 11 cases
  • Represented GT Advanced Technologies, Inc., as special litigation counsel, in its Chapter 11 case
  • Represented Honorable Richard S. Schmidt as Litigation Trustee for the Black Elk Offshore Operations, LLC Litigation Trust, as special litigation counsel, in its Chapter 11 case
  • Represented GPB Capital Holdings in the Insightra Medical, Inc. Chapter 11 case
  • Represented Ad Hoc Group of Noteholders of Black Elk Energy Offshore, Inc. in its Chapter 11 case
  • Represented Boomerang Systems, Inc. in its Chapter 11 case

Bar & Court Admissions

  • Massachusetts
  • U.S. District Court, District of Massachusetts
  • U.S. Court of Appeals for the First Circuit
  • U.S. Court of Appeals for the Second Circuit


  • J.D., Boston College Law School
  • B.A., Washington University in St. Louis

Community Engagement

  • Associates Drive Co-Chair, Greater Boston Legal Services (2020, 2021, 2022)
  • Boston Bar Association
  • Volunteer, Breast Cancer Research Foundation
  • Volunteer, Tina's Wish Boston NextGen Group

Awards & Honors

  • "Ones to Watch," Best Lawyers in America®, Litigation/Bankruptcy (2021, 2022)
  • The Legal 500 U.S., 2021
  • Recipient, 2021 Pro Bono Honor Roll, U.S. Bankruptcy Court for the District of Massachusetts

Seminars & Presentations


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