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James D. Gassenheimer

Partner
305-714-4383
jgassenheimer@bergersingerman.com
1450 Brickell Avenue
Suite 1900
Miami, FL 33131

James Gassenheimer is a Partner on Berger Singerman’s Dispute Resolution and Business Reorganization Teams. He has extensive jury and non-jury trial experience in State, Federal and Bankruptcy court, having tried over 100 cases to jury verdict or judgment. His practice includes real estate related litigation, business torts, complex commercial litigation, bankruptcy litigation, insurance litigation, and product liability litigation. James is Board Certified as a Civil Trial Lawyer by The Florida Bar and National Board of Trial Advocacy and has been recognized as a leading commercial trial lawyer and bankruptcy trial lawyer by Chambers USA and The Best Lawyers in America. He currently serves on the Executive Council of the Trial Lawyers Section of The Florida Bar and is Chair of its Civil Trial Law Certification Committee.

Education

J.D., cum laude, University of Miami School of Law


B.A., Brown University

Bar Admissions

Florida
U.S. Court of Appeals, Eleventh Circuit
U.S. District Courts, Northern, Southern and Middle Districts of Florida

Practice Teams

Dispute Resolution
Business Reorganization

Practice Areas

Bankruptcy Litigation
Complex Commercial Litigation
Director/Officer Litigation & Partnership Disputes
Fiduciary Litigation
Insurance
Real Estate Litigation
Trust & Probate Litigation

Representative Matters
Awards & Honors
Community Activities / Associations
In the News

The Daily Business Review Features James Gassenheimer in, "Two Paths to Justice in Florida: Florida Attorneys Weigh in on ADR"
September 22, 2025

James Gassenheimer and Stephanie Chaissan Elected to Leadership Roles in The Florida Bar’s Trial Lawyers Section
July 1, 2025

Berger Singerman Attorneys Listed in the 2025 Edition of Lawdragon 500 Leading Global Bankruptcy and Restructuring Lawyers
June 27, 2025

Twenty-Three Berger Singerman Attorneys Recognized in 2025 Edition of Florida Super Lawyers
June 26, 2025

Daily Business Review Features James Gassenheimer in, "Social Media Celebrities Clash in $100M Lawsuit"
December 27, 2024

Fifty-Six Berger Singerman Attorneys Recognized in the 2025 Edition of Best Lawyers In America
August 15, 2024

The Florida Bar Elects James D. Gassenheimer as Secretary and Treasurer of its Trial Lawyers' Section
July 8, 2024

Berger Singerman Attorneys Listed in the 2023 Edition of Lawdragon’s 500 Leading U.S. Bankruptcy and Restructuring Lawyers
June 20, 2023

Berger Singerman Recognized by Chambers USA for Twentieth Consecutive Year
June 1, 2023

Berger Singerman Represents Charles Lydecker, Alan Florez and Ben Barbieri as founding partners of Foundation Risk Partners in Stunning Court Victory over Brown & Brown Insurance
December 6, 2022

The Daytona Beach News Journal Quotes James Gassenheimer in, "Daytona's Foundation Risk scores victory in court fight with crosstown rival Brown & Brown"
November 21, 2022

Forty-Three Berger Singerman Attorneys Recognized in the 2023 Edition of Best Lawyers In America
August 18, 2022

Berger Singerman Recognized by Chambers USA for Nineteenth Consecutive Year
June 1, 2022

Thirty-Nine Berger Singerman Attorneys Recognized in the 2022 Edition of Best Lawyers In America
August 19, 2021

The Real Deal quotes James Gassenheimer in "HFZ Capital off the hook for $6M in failed Shore Club South Beach deal"
June 11, 2021

Berger Singerman’s Bankruptcy Litigation Practice Recognized As 2021 “Litigation Departments of the Year” By Daily Business Review
March 29, 2021

Thirty-Five Berger Singerman Attorneys Recognized in the 2021 Edition of Best Lawyers In America
August 19, 2020

Twenty-Seven Berger Singerman Attorneys Recognized in 2020 Edition of Florida Super Lawyers
June 8, 2020

Daytona Beach News-Journal Features Berger Singerman in "Legal War Escalates Between Daytona’s Brown & Brown, Crosstown Upstart Foundation Risk"
December 1, 2019

Twenty-one Berger Singerman Attorneys Listed in South Florida Legal Guide as Top Attorneys
October 31, 2019

Thirty Berger Singerman Attorneys Recognized in the 2020 Edition of Best Lawyers In America
August 14, 2019

Twenty-Eight Berger Singerman Attorneys Recognized in 2019 Edition of Florida Super Lawyers
May 29, 2019

Berger Singerman Recognized by Chambers USA for Sixteenth Consecutive Year
April 24, 2019

Berger Singerman Recognized by Chambers USA for Sixteenth Consecutive Year
April 24, 2019

South Florida Legal Guide Names 21 Berger Singerman Attorneys as Top Lawyers
March 7, 2019

Daytona Beach News-Journal quotes James Gassenheimer in, "Brown"
January 21, 2019

Thirty Berger Singerman Attorneys Recognized in the 2019 Edition of Best Lawyers In America
August 14, 2018

Thirty-One Berger Singerman Attorneys Recognized in 2018 Edition of Florida Super Lawyers
June 17, 2018

Berger Singerman Recognized by Chambers USA for 15th Consecutive Year
May 2, 2018

Berger Singerman Recognized by Chambers USA for 15th Consecutive Year
May 2, 2018

South Florida Legal Guide Names 23 Berger Singerman Attorneys as Top Lawyers
January 9, 2018

Law360 quotes James Gassenheimer in, "Israeli Court Nixes Arbitration Clause In Real Estate Row"
January 2, 2018

Thirty Berger Singerman Attorneys Recognized in the 2018 Edition of Best Lawyers In America
August 14, 2017

Law360 quotes James Gassenheimer in, "M&A Bankers Amp Up Disclosures Amid Chancery Crackdown"
July 2, 2017

Thirty-Two Berger Singerman Attorneys Recognized in the 2017 Super Lawyers Florida Edition
June 8, 2017

Berger Singerman Receives High Marks by Chambers USA for Fourteenth Consecutive Year
May 29, 2017

Daily Business Review: Regions Bank Must Cough Up Attorney-Client Communications in Check-Kiting Case
May 9, 2017

Daily Business Review profiles James Gassenheimer on "Triathlete-Lawyer Looks Back on His Path to Law"
April 13, 2017

Twenty-Eight Berger Singerman Attorneys Recognized in the 2017 Edition of Best Lawyers In America
August 14, 2016

Tampa Bay Business Journal interviews James Gassenheimer on "Synovus to pay $9M to settle claims involving Clearwater firms"
August 8, 2016

Thirty-Six Berger Singerman Attorneys Recognized in the 2016 Super Lawyers Florida Edition
June 13, 2016

Berger Singerman's Dispute Resolution Team Receives High Marks by Chambers USA
June 7, 2016

Berger Singerman Receives High Marks by Chambers USA for Thirteenth Consecutive Year
June 1, 2016

AllBusiness.com Quotes James Gassenheimer on "Law and Order: Don't Let Your Business Succumb to Litigation"
February 14, 2016

Publications

the Edge: A Publication of the Trial Lawyers Section of The Florida Bar "Trial By Zoom: The New Trial By Fire"
August 16, 2021

Law360, "Florida Private Trials An Attractive Option During COVID-19"
March 23, 2020

South Florida Legal Guide, "Courts Continue to Tighten the Reins on Expert Witness Testimony"
March 7, 2019

Daily Business Review, "GARA Still a Powerful Tool in Aircraft Litigation Cases"
August 20, 2017

Miami Herald, "Is there a new wave of Ponzi schemes coming? There's a possibility"
March 18, 2017

There Oughta Be a Law: Steering Clear of Ponzi Schemes
December 29, 2016

Events & Speaking Engagements

James Gassenheimer, Faculty Member, "NITA's 2024 Florida Trial Skills Program"
October 7, 2024

James Gassenheimer, Faculty Member, "NITA's 2023 Florida Trial Skills Program"
October 9, 2023

James Gassenheimer, Speaker, " 2023 Teachers' Law Symposium", The Florida Bar Trial Law Section
January 20, 2023

James Gassenheimer, Speaker, "Deposition 360: Preparation, Strategy, and Execution of Taking An Effective Deposition"
February 26, 2019

James Gassenheimer, Speaker, "E-Discovery: How to Avoid Being TAR-ed and Feathered for the Foreign Entrepreneur," American Bankruptcy Institute
January 17, 2018

James Gassenheimer, Speaker, "CLE: Deposition Boot Camp," Business Law Section of The Florida Bar
May 18, 2017

James D. Gassenheimer, Speaker, "The Exposure of Banks and Financial Advisors to Claims for Aiding and Abetting Breach of Fiduciary Duty After RBC Capital Markets, LLC v. Jervis," Commercial Litigation Seminar
October 18, 2016

James Gassenheimer, Speaker, "Evidence for Bankruptcy Lawyers Taught by Real Trial Lawyers," The Bankruptcy Bar Association
March 10, 2016

Prior Affiliations