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Partner - Jill M. O'Toole

Jill M. O'Toole


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Jill O’Toole is the Co-Chair of the firm's Business Litigation Practice Group. She has significant experience representing clients in complex commercial litigation, including state and federal class actions and multi-district litigation. She regularly represents manufacturing clients in litigation involving supply chain issues, customer disputes and distributors. Her cases cover a broad range of business disputes involving antitrust, trade regulation, securities, fiduciary duties, insurance, contracts, business torts, and intellectual property.  Jill has worked extensively with experts in diverse fields such as agriculture, econometrics, software testing, corporate trust, and securities.  Jill has been lead trial lawyer in state and federal courts in technology and financial services disputes.  She has also represented clients in international arbitrations, and appeals before various federal Circuit Courts of Appeals, and the Connecticut appellate courts.

Jill is lead counsel for a dairy cooperative in class action antitrust litigations regarding milk supply and pricing.  Her clients include financial institutions, financial services companies, closely held corporations, limited liability companies, and partnerships.

In the area of government investigations and white collar criminal defense, Jill represents clients for civil, criminal, and military matters involving various federal and state agencies.  She handles investigations into matters involving bribery, theft, kickbacks, conspiracy, fraud, false statements, False Claims Act, Foreign Corrupt Practices Act, terrorist financing laws, military contracts, and federal and state government contracts. She also works with clients to evaluate and develop compliance programs.

Jill serves on the firm’s E-Discovery and Information Governance Group and advises her peers and clients on electronic data preservation, collection, review, and production in state and federal courts.

Before joining Shipman & Goodwin, Jill was a member of the litigation department at the New York law firm of Simpson Thacher & Bartlett LLP.  She also served as a law clerk for U.S. District Judge Gerard L. Goettel (S.D.N.Y.) and U.S. Magistrate Judge William I. Garfinkel (D. Conn.).


  • Listed as a Connecticut Super Lawyer®: Business Litigation (2014-2020)
  • AV Preeminent® Rated, Martindale-Hubbell
  • Listed in the Bar Register of Preeminent Women Lawyers (2011-2012)
  • Fordham International Law Journal, Special Publications Editor
  • Moot Court Member (National Team)

Professional Affiliations

  • American Bar Association
  • Connecticut Bar Association: Antitrust & Trade Regulation Section, Executive Committee (2018-2021)
  • New York State Bar Association

Community Involvement

  • Volunteer for community activities at St. Patrick-St. Anthony Church
  • ​Wellesley College Alumnae Association

Financial Services Litigation

Represent Fortune 200 financial services company as security trustee in lawsuit brought by borrower alleging breach of fiduciary duty and breach of collateral trust indenture in connection with multi-million dollar issuance of debt products. Successfully obtained dismissal of several claims.

Securities Litigation

Reached favorable settlement on behalf of corporate investor against issuers in federal court lawsuit alleging state and federal securities violations, and other state law claims.

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Practice Areas

Industries & Featured Services


  • Fordham University School of Law, J.D., 1997, cum laude, Order of the Coif
  • Wellesley College, B.A., 1992, cum laude

Bar Admissions

  • Connecticut
  • New York

Court Admissions

  • U.S. District Court, District of CT
  • U.S. District Court, Southern District of NY
  • U.S. District Court, Eastern District of NY
  • U.S. District Court, Northern District of NY
  • U.S. Court of Appeals for the Second Circuit
  • U.S. Court of Appeals for the Seventh Circuit
  • U.S. Court of Appeals for the Ninth Circuit
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