Roscoe Trimmier, Jr.

Retired Partner



  • JD, Harvard Law School, 1974
  • BA, Harvard College, 1966


  • Massachusetts, 1974
  • American Bar Association
  • Boston Bar Association
  • Massachusetts Bar Association
  • American Bar Foundation
  • American College of Trial Lawyers
  • American Law Institute
  • Massachusetts Bar Foundation
  • Massachusetts Black Lawyers Association

He has participated as a faculty member or presenter in a number of conferences and seminars, including the Executive Enterprises natural resource damages conferences; the "Corporate Environmental Excellence Conference" sponsored by Arthur D. Little, Inc. and The Conference Board; the Society of Environmental Toxicologists and Chemists Annual Meeting; and several seminars and conferences sponsored by the American Law Institute/American Bar Association on environmental law and federal litigation practice. He also has authored several articles on environmental litigation, including a chapter in a monograph published by the National Legal Center for the Public Interest.

Roscoe has served as vice-chair of the Massachusetts Board of Registration in Medicine.  He has also served as overseer for the New England Medical Center Hospitals and Lifespan Healthcare.

Roscoe Trimmier, Jr.

Retired Partner

Roscoe Trimmier, Jr., a retired partner of Ropes & Gray, has served as chair of the firm's Litigation Department, the head of the Environmental Practice Group, and as a member of the Hiring Committee and the Associates Committee. He is an accomplished trial lawyer involved in a variety of litigation matters for corporate clients, utilities, high-technology entities, and governmental authorities in state and federal courts. His practice has provided significant professional trial experience in economics, statistics, modeling, and scientific and high-technology issues.


Some aspects of Roscoe's practice included the representation of health care providers in disputes concerning the operation and management of HMOs, the representation of major corporations and investors on issues relating to the acquisition of or merger with other entities, and the representation of the Massachusetts Port Authority in connection with its "Logan Airside Improvements" redevelopment program for Logan Airport.

Roscoe regularly represented major utility clients in public utility regulatory proceedings at the state and federal level. He has considerable experience in the areas of electric utility industry restructuring and deregulation and the convergence in the telecommunication industry. He also had a diverse litigation practice involving commercial disputes, securities regulation, and other complex cases.


  • The Best Lawyers in America (2006-2032)
  • Massachusetts Super Lawyers (2004-2009)
  • American College of Trial Lawyers, Fellow