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William M. O’Donnell III

William M. O’Donnell III

Partner

  • Waterbury
  • [email protected]

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  • 203.575.2633
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Legal Services

  • Litigation
  • Medical Malpractice Defense
  • Personal Injury
  • Workers’ Compensation

Industries

  • Healthcare

Education

  • University of Connecticut School of Law, J.D., 1995
  • Yale University, B.A., 1992

Admissions

Bar Admissions

  • Connecticut

Court Admissions

  • U.S. District Court, District of Connecticut

William M. O’Donnell III

Partner

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Home » Our Team » William M. O’Donnell III

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Bill is a trial attorney with almost 30 years of experience.  He has successfully tried several cases to verdict before the Connecticut Superior Court and United States District Court, and has successfully argued matters before the Connecticut Supreme Court and Connecticut Appellate Court.  In 2019, Bill obtained his Certificate of Special Education Advocacy from the William & Mary Law School Institute of Special Education Advocacy, an intensive program focused on providing families with the legal and practical advice needed to navigate special education challenges.  In addition to advocating on behalf of his own clients, Bill has been selected by fellow attorneys to serve as an arbitrator in litigation matters.

Bill is a member of the firm’s Healthcare team and routinely represents hospitals, physicians and other healthcare providers in the defense of medical malpractice actions.  He has experience defending complex cases involving wrongful death, delayed diagnosis of cancer, surgical complications and psychiatric claims.  Bill has provided risk management counseling to hospitals and individual healthcare professionals in such areas as HIPAA compliance, professional licensing, medical records and issues relating to the treatment of minor patients.  Bill has also represented healthcare professionals in the defense of investigations by the Department of Public Health and has conducted in-house seminars on various risk management topics.

Bill is also a member of the firm’s Personal Injury team, representing individuals who have suffered serious injuries or death as a result of the negligent conduct of others.  His personal injury cases typically involve automobile and truck collisions, motorcycle accidents, pedestrian accidents, defective premises, dram shop liability, defective products and construction accidents.

Bill also represents employers in the defense of workers’ compensation claims.  He has litigated workers’ compensation matters at the informal, pre-formal and formal hearing levels throughout the State, and he has argued workers’ compensation appeals before the Compensation Review Board.  Bill has extensive experience in defending workers’ compensation discrimination and wrongful termination claims brought pursuant to Connecticut General Statutes § 31-290a.

Affiliations

  • Waterbury Bar Association,  President, 2010-2012; Vice President, 2008-2010; Treasurer, 2006-2008; Board Member, 2005-2012

  • Connecticut Bar Association

  • American Bar Association

  • Connecticut Trial Lawyers Association

  • Co-chair of Waterbury Bench/Bar Symposium on Professionalism, 2011

  • Co-chair of Waterbury-Litchfield Bench/Bar Symposium on Professionalism, 2005

  • Yale Club of Hartford, Board Member, 2023-present

  • Yale Club of Northwestern Connecticut, Board Member, 2003-2023

  • Yale Alumni Schools Committee, Director, 2003-present

Distinctions

  • Best Lawyers® – Workers’ Compensation Law: Employers, 2024, Personal Injury Litigation: Plaintiffs, 2024-2026

  • Certificate of Special Education Advocacy, 2019

Community

  • Boy Scout Troop 52, Troop Committee Member
  • Watertown-Oakville Little League, Baseball Coach
  • Watertown Association for Youth Soccer, Travel Soccer Coach

Carmody Lawyers Ranked in More Than 30 Areas of Law by Best Lawyers in 2026

August 21, 2025
Carmody Torrance Sandak & Hennessey LLP has received more than 110 accolades across over 30 areas of law and across all its offices in Connecticut, in the 32nd edition of The Best Lawyers in America® 2026. Forty-nine Carmody lawyers are named to the ‘Best Lawyers’ list for Stamford and New
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Carmody Lawyers Ranked in More than 30 Areas of Law in Best Lawyers in America 2024

August 17, 2023
Carmody Torrance Sandak & Hennessey has received more than 90 accolades across over 30 areas of law and across all its offices in Connecticut, in the 30th edition of The Best Lawyers in America® 2024. Forty-two Carmody lawyers are named to the ‘Best Lawyers’ list and ten lawyers are listed
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Carmody Lawyers Named to The Best Lawyers in America 2023 List

April 05, 2023
Carmody is pleased to announce that 39 attorneys have been selected for inclusion in The Best Lawyers in America 2023. In addition, Giovanna Tiberii Weller and William J. Hennessey Jr. have been named ‘Lawyer of the Year’ in New Haven, CT and Stamford, CT for Employment Law and Land Use & Zoning
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Carmody attorneys named to The Best Lawyers in America 2022 List

September 20, 2021
Carmody is pleased to announce that 30 attorneys have been selected for inclusion in The Best Lawyers in America 2022. Three Carmody attorneys have also been recognized as "Lawyer of the Year". Congratulations to David T. Grudberg, William J. Hennessey, Jr. and Peter M. Nolin. Only one lawyer is recognized
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