Mannion Prior founder and Managing Partner James F. Mannion concentrates his practice exclusively on Orphans’ Court litigation, and is recognized as a leading member of Pennsylvania’s Orphans’ Court Bar. His practice includes fiduciary litigation, will contests, trust disputes, estate litigation, guardianship proceedings and litigation, fee and commission disputes, and non-profit/charitable litigation.
James has successfully litigated at the trial and appellate court levels. He has served as lead counsel on numerous cases of first impression, including the first reported decision recognizing a claim for tortious interference with an inheritance under Pennsylvania law, and the 2005 Pennsylvania Superior Court en banc decision in W.W. Smith Trust.
James’ many publications include The Presumption of Undue Influence and the Shifting Burden of Proof, cited and relied upon by judges throughout Pennsylvania.
He lectures frequently on fiduciary litigation and Orphans’ Court matters, and has served as an expert witness in fiduciary litigation matters.
B.B.A. 1987, Pace University
J.D. 1990, The George Washington University National Law Center
L.L.M. in Taxation 1993, Villanova University School of Law
Admitted to practice in Pennsylvania
Admitted to practice in the United States Tax Court
Best Lawyers in America, “Lawyer of the Year” – 2018
The Best Lawyers in America ©, Litigation – 2011-2019
American Lawyer Media and Philadelphia Magazine, Pennsylvania “Super Lawyer” – 2004-2018
The Best Lawyers in America ©, Trusts & Estates – 2003-2010
AV® Preeminent™ Peer Review Rated by Martindale-Hubbell
Court of Common Pleas of Montgomery County, Civil Trial Division, Discovery Master
The American College of Trust and Estate Counsel (ACTEC), Fellow
ACTEC Fiduciary Litigation Committee and Attorney Malpractice Subcommittee, Member
Pennsylvania Joint State Government Commission Advisory Committee on Decendent’s Estate Laws, Member
Joint State Subcommittee on Orphans’ Court Matters, Member
Pennsylvania Supreme Court Orphans’ Court Procedural Rules Committee, Deputy Counsel 2006-2008
Pennsylvania Bar Association, Member
Philadelphia Bar Association, Probate and Trust Law Section
Montgomery County Bar Association, Director
Montgomery County Bar Association, Rules of Orphans’ Court Committee, Co-Chair
Montgomery County Bar Association, Bench Bar Executive Committee, Member
Smith, Aker, Grossman & Hollinger
Ballard Spahr Andrews & Ingersoll, LLP
Dilworth Paxon Kalish & Kauffman (Now Dilworth Paxson, LLP)