Frank S. Guarrieri

Partner, Litigation, Insurance Law and Personal Injury Law

Bar Admissions

  • 1977, PA
  • U.S. Supreme Court

Bar Memberships

  • Pennsylvania
  • Bucks County
  • Northampton County


  • B.A., magna cum laude, University of Notre Dame, 1974
  • J.D., University of Pittsburgh, 1977


Frank S. Guarrieri was Law Clerk to the Honorable Alfred T. Williams,  Judge of the Court of Common Pleas of Northampton County from 1977-1978.


Frank S. Guarrieri is Managing Partner of the firm and bears ultimate responsibility and authority for its overall operations and administration. A seasoned trial attorney with substantial courtroom experience, Mr. Guarrieri also chairs the firm’s Litigation Section. He represents clients throughout the region and handles matters relating to personal injury, both plaintiff and defense, and insurance coverage.

Mr. Guarrieri was co-counsel in Buongiovanni v. GM, a products liability case resulting in a $46M award for his injured client.

Mr. Guarrieri is a frequent lecturer on civil litigation topics at forums state-wide.  Mr. Guarrieri has consistently been named a Pennsylvania Super Lawyer through a peer-review process in the area of Insurance Law as published by Thomson Reuters in Philadelphia Magazine.  In 2011, Mr. Guarrieri was asked by Thomson Reuters to serve on its select blue ribbon panel to help evaluate the nominees for Pennsylvania Super Lawyers.  Mr. Guarrieri’s Martindale-Hubbell Peer Review Rating is AV. From 2012 through 2014 Mr. Guarrieri was named one of Philadelphia’s Top Lawyers through a confidential peer review process in a magazine published jointly by The Philadelphia Inquirer, The Legal Intelligencer,, The National Law Journal, the American Lawyer, Corporate Counsel, and The Wall Street Journal.  In 2013, Mr. Guarrieri was named by Martindale-Hubbell as one of the nation’s Top Rated Lawyers in Insurance Defense through a confidential peer review process in a magazine published jointly with The American Lawyer, The National Law Journaland Corporate Counsel and has been named yearly therafter.

Mr. Guarrieri is a Board Member of Saint Mary Medical Center and formerly served as the Chair of the Board of Trustees and Foundation Board. He is Past President of Mision Tu Puedes, Inc., a non-profit that promotes educational opportunities in the Dominican Republic and has formerly served as Chair of the Board of Trustees of the Holy Ghost Preparatory School.

Mr. Guarrieri lives in Wrightstown, Bucks County with his wife of 46 years, Mary Ann, and enjoys travel, reading and gardening.

Professional Organizations

  • American Arbitration Association
  • American and Pennsylvania Associations for Justice
  • Pennsylvania Defense Institute
  • Defense Research Institute


Mr. Guarrieri was the 2007 recipient of The Holy Ghost Preparatory School James P. McCloskey C.S.Sp. ’70 Alumni Award  and also the 2013 recipient of the Bucks County Bar Association Mark E. Goldberg Community Service Award.

Charitable, Community and Civic Involvement

  • St. Mary Medical Center Board
  • Holy Ghost Preparatory School
  • Mision Tu Puedes, Inc.