Thomas D. Collignon

Civil Mediator


Tom is a Registered Civil Mediator and has conducted mediations involving personal injury, business disputes, and construction disputes.

As managing partner and shareholder of Collignon Dietrick, P.C., Tom focused his practice on the representation of business clients in complex litigation matters including breach of fiduciary duty, bad faith, insurance disputes, breach of contract, real estate disputes, and shareholder disputes. Tom represented the CEO and President of Firstmark Bank in a $200 million class action civil RICO case and successfully defended an Indianapolis Engineering firm in a $52 million construction dispute with the Indianapolis Marion County Public Library. Tom has also represented a variety of professionals in disciplinary proceedings, professional malpractice litigation, licensing issues and administrative matters.

Tom is an avid runner having completed the Indianapolis, New York, Chicago, Big Sur and Marine Corp Marathons. In 2010 he successfully completed the JFK 50 ultra marathon - a 50 mile run that begins on Appalachian Trail and traces the C&O tow path along the Potomac River in Maryland. In 2013, Tom successfully completed the inaugural Indiana Trail 100 mile ultra marathon. Tom also enjoys playing guitar and spending time with his wife and three children.

Education & Qualifications

  • Indiana University School of Law - Indianapolis, J.D. 1994
  • Admitted to the U.S. District Court for the Northern District of Indiana 1994
  • Admitted to the U.S. District Court for the Southern District of Indiana 1994
  • Registered Civil Mediator 2006 / Registered Family Law Mediator 2008