Mat Sibble is of counsel in Goodwin's Financial Industry practice and former co­-chair of the firm's Debt Finance practice. With over 40 years of experience, Mr. Sibble has an extensive debt finance practice representing institutional lenders, borrowers and equity sponsors on financing transactions on a broad range of complex financings, including acquisition and leveraged buyout financings, capital call lines and credit facilities. Mr. Sibble’s practice also extends to tax-exempt financings, both as nationally recognized bond counsel and as counsel to underwriters and other participants in public offerings. Mr. Sibble is continuously ranked by clients and peers in Chambers USA, and has been singled out for being “extremely proactive, practical, and knowledgeable.”

Areas of Practice
Domaines D’Expertise





Mr. Sibble represents major regional, national and international banks in a broad range of matters. His clients also include private equity sponsors, venture capital firms and their portfolio companies in financing transactions. Representative matters include:

  • Over $500 million of credit facilities to professional sports franchises
  • Over $1 billion of syndicated credit facilities representing Agents to borrowers in a wide range of industries
  • Over $3 billion of capital call liquidity facilities provided by senior lenders
  • Over $1 billion of acquisition facilities for private equity sponsors and their portfolio companies
Professional Activities

Mr. Sibble is a member of the Massachusetts Bar Association, the American College of Investment Counsel and the National Association of Bond Lawyers.

Professional Experience

After graduating law school, Mr. Sibble served as law clerk for The Honorable Levin H. Campbell, United States Court of Appeals for the First Circuit.


Mr. Sibble has been selected for inclusion in Chambers USA: America’s Leading Lawyers for Business.

While in law school, Mr. Sibble served as Editor-­in-­Chief of the Georgetown Law Journal at Georgetown University Law Center.

In The News









J.D., 1976
Georgetown University Law Center
A.B., 1973
Harvard University

(magna cum laude)


1976 to 1977 U.S. Court of Appeals for the First Circuit, Honorable Levin H. Campbell



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Our clients rely on us for world-class advisory services, counsel on complex transactional work and high-stakes litigation. Specializing in matters involving the financial, life sciences, private equity, real estate, and technology industries, we use a collaborative, cross-disciplinary approach to resolve our clients’ most challenging issues. To find out more, please contact us.


Nos équipes interviennent aux côtés de nos clients, industriels, fonds d’investissement, startups, institutions financières et dirigeants, dans le cadre de transactions et de contentieux complexes, et apportent des conseils de tout premier plan dans les secteurs financiers, des Sciences de la Vie, du Private Equity, de l’immobilier et des technologies. Nous traitons les dossiers juridiques de manière intègre, ingénieuse, souple et audacieuse pour répondre efficacement aux enjeux propres à chacun de nos clients, quels que soient la taille de l’opération et le secteur d’activité. Pour en savoir plus, contactez-nous.

Unsere Kunden verlassen sich auf unsere erstklassige Beratung, vor allem im Hinblick auf komplexe Transaktionen und High-Stakes-Prozesse. Spezialisiert auf Angelegenheiten der Finanz-, Life-Sciences-, Private-Equity-, Immobilien-und Technologie-Branchen, verwenden wir einen kooperativen und interdisziplinären Ansatz, um Fragen unserer Kunden auch in extremen Spezialsituationen einer Lösung zuzuführen. Sie wollen mehr erfahren? Kontaktieren Sie uns gerne.

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