Professional Affiliations

The Florida Bar

The Utah Bar

American Bar Association

American Board of Trial Advocates

International Society of Barristers

Multi-Million Dollar Advocates Forum

National Crime Victim Bar Association

Florida Academy of Professional Mediators, ADR Section

Trial Lawyers Section, Florida Bar

Bar Admissions



Court Admissions

Florida State Courts

Utah State Courts

U.S. District Court, Middle District of Florida

U.S. District Court, Southern District of Florida

U.S. District Court, Northern District of Florida

U.S. Court of Appeals, Eleventh Circuit


Certified Circuit Civil Mediator

Mr. Callahan has forty-four years of experience as a trial lawyer and has handled cases involving major bodily injury and wrong death cases, major construction projects, business insurance claims, product liability, aviation accidents, and maritime accidents. He currently focuses his law practice primarily on representing persons involved in injury and wrongful death accidents (medical and professional malpractice), bad faith litigation against insurance companies, product liability, and aviation law. He specializes in bad faith litigation involving persons whose insurance companies have wrongfully failed to settle claims against them within their insurance policy limits. 

Mr. Callahan also serves as a mediator in a variety of legal matters.

Callahan Law Firm, LLC, Owner, 2014-present
Callahan Martinez, LLC Partner, 2002-2014 
The Callahan Law Firm, Owner, 1975-2002  

Mr. Callahan has been a long-time supporter of the Cedar Key Community Food Bank and is involved in several community charitable projects in Pinellas County. Between 2011-present, he raised funds for and built two new primary schools, a village well, and a dormitory for girls so that they could attend high school away from home, for Berber communities located in the Atlas Mountains of Morocco. Mr. Callahan is currently involved in a project to provide artificial limbs to Vietnamese citizens who were the victims of post-war accidental ordinance explosions in Quang Tri province.

J.D., University of Florida Law School, 1973
B.A., University of Florida, 1969 Political Science

American Board of Trial Advocates, National President 2013
Trustee of the ABOTA Foundation - 2011-2013
Inclusion in the 23rd Edition of The Best Lawyers in America
​America’s Top 100 Attorneys – Lifetime Achievement – Northern Florida – 2017
Bar Register of Preeminent Lawyers, 1999-2017
Joseph P. Milton Award for Professionalism, 2013
Top Attorneys in Florida, 2011-2018
Top Lawyers of Tampa, 2014; 2016-2017
AV Preeminent - Martindale Hubbell - The Highest Possible Rating 2018
Fellow International Society of Barristers 2011-2018
Florida Super Lawyers, 2009-2018
Florida Trial Legal Elite, 2011
Florida Academy of Professional Mediators 
Masters in Trial Award, 2006
Florida Board of Trial Advocates, President, 2002

Faculty – ABOTA National Trial College, Harvard Law School – 2014; 2016

​Faculty – ABOTA National Trial College, Yale Law School – 2018​

Callahan Law Firm, LLC

Practice Areas

Civil Tort Litigation, State and Federal

​Bodily Injury and Wrongful Death

Bad Faith Litigation

Products Liability

Aviation Accidents

Construction Litigation

Professional Malpractice