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Ernest J. Marquart

Bank of America Plaza
101 E. Kennedy Boulevard
Suite 2800
Tampa, FL 33602


Mandy Desilles

Ernie Marquart's practice focuses on business litigation. He has extensive experience representing public and private companies, partnerships, and individuals in state and federal courts at both the trial and appellate levels. He also has represented clients before the American Arbitration Association, governmental agencies, and in administrative proceedings. Ernie has regularly represented clients in a variety of cases involving commercial contracts; construction projects; real estate, health care management, and franchise matters; securities and shareholder disputes; and transportation, environmental, and intellectual property issues. He also has substantial experience representing creditors in federal bankruptcy courts.

Ernie served on the firm's Management Committee from 2004 through 2011 and was the Managing Partner of the Tampa office from 2009 to 2011. He was head of the Tampa office Litigation Department and co-chair of the Litigation Department firm-wide from 2001 to 2003 and was a member of the firm's Professional Development Committee from 1993 to 2000.

Representative Matters

  • Representing the owner of a high rise office tower against a major investor’s excessive claims to profits from the sale of the building.
  • Defending a national retailer against a competitor’s efforts to limit its operations at more than eighty locations in five states.
  • Defending a global architecture firm against a hospital owner’s delay claims and simultaneously pursuing design claims against other project professionals.
  • Defending a nationwide pharmacy operator against contract and tort claims following termination of a vendor’s supply contract.


  • AV® Peer Review rated by Martindale-Hubbell
  • Best Lawyers in America, 2013 - 2019
  • Florida Super Lawyer by Super Lawyers magazine, 2010 - 2018
  • Top Lawyer by Tampa Bay Magazine

Professional and Community Affiliations

  • The Florida Bar, Business Law Section
  • The Hillsborough County Bar Association
  • The American Bar Association, Litigation Section and Tort Trial and Insurance Practice Section
  • Florida Bar Thirteenth Judicial Circuit Grievance Committee "A", 1997 -  2000; Vice-Chair, 2000
  • Academy of the Holy Names, Board of Trustees, 2016 - present
  • Leadership Tampa Alumni, Class of 2008
  • New Tampa Family YMCA, Board of Directors 2001 - 2007, 2009 - 2013; Chairman, 2003 - 2006
  • Florida Hospital Wesley Chapel Foundation, Board of Trustees, 2011 - 2013
  • Hillsborough County Consumer Protection Board, 2001 - 2005; Vice-Chair, 2002; Chairman, 2003 - 2005
  • Westover Homeowners Association, Board of Directors, 2003 - 2005
  • New Tampa Family YMCA, Youth Soccer and T-Ball Coach, 2002 - 2009
  • Temple Terrace Little League, Youth Baseball Coach, 2010 - 2013
  • Corpus Christi Catholic Church, Temple Terrace, Florida
  • The University Club of Tampa

News Releases

08.15.2018Shumaker Lawyers Recognized in The Best Lawyers in America® 2019
06.18.2018Shumaker, Loop & Kendrick, LLP Attorneys Named 2018 Florida Super Lawyers and 2018 Florida Rising Stars
08.17.2017Shumaker Lawyers Recognized in The Best Lawyers in America® 2018
06.08.2017Shumaker, Loop & Kendrick, LLP Attorneys Named 2017 Florida Super Lawyers® and 2017 Florida Rising Stars
11.09.2016Ernie Marquart Appointed to Board of Trustees of The Academy of the Holy Names
08.16.2016Shumaker Lawyers Recognized in The Best Lawyers In America® 2017
06.09.2016Shumaker, Loop & Kendrick, LLP Attorneys Named 2016 Florida Super Lawyers and 2016 Florida Rising Stars
08.19.2015Shumaker Lawyers Recognized in The Best Lawyers In America® 2016
06.12.2015Shumaker, Loop & Kendrick, LLP Attorneys Named 2015 Florida Super Lawyers and 2015 Florida Rising Stars
08.21.201483 Shumaker, Loop & Kendrick, LLP Lawyers Selected for Inclusion in The Best Lawyers in America® 2015
06.16.2014Shumaker, Loop & Kendrick, LLP Attorneys named 2014 Florida Super Lawyers and 2014 Florida Rising Stars
08.15.201383 Shumaker, Loop & Kendrick, LLP Lawyers Selected for Inclusion in The Best Lawyers in America® 2014
06.13.2013Shumaker, Loop & Kendrick, LLP Attorneys Named 2013 Florida Super Lawyers and 2013 Florida Rising Stars
08.28.201281 Shumaker, Loop & Kendrick, LLP Lawyers Selected for Inclusion in The Best Lawyers in America® 2013
03.30.2012Shumaker, Loop & Kendrick, LLP Announces New Tampa Office Managing Partner and Management Committee Addition
02.21.2012Ernie Marquart Appointed to Florida Hospital Wesley Chapel Foundation Board of Trustees
06.10.2011Shumaker, Loop & Kendrick, LLP Attorneys Named 2011 Florida Super Lawyers and 2011 Florida Rising Stars
06.07.2010Shumaker, Loop & Kendrick, LLP Attorneys Named 2010 Florida Super Lawyers and 2010 Florida Rising Stars

Alternate biographies



  • J.D., with honors, University of Florida, 1991
  • B.A., magna cum laude, Boston University, 1986

Bar and Court Admissions

  • Florida, 1991
  • United States Court of Appeals Eleventh Circuit
  • United States District Court Northern, Middle and Southern Districts of Florida



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