Marlon Weiss is a commercial litigator and board-certified appellate lawyer who represents clients in a range of complex disputes involving matters of business tort, contract, fiduciary relationships, and unfair and deceptive trade practices.

Marlon has experience counseling government and private clients in all stages of litigation and has personally argued 35 appeals in state and federal court. He was twice appointed to the Florida Bar’s Appellate Rules Committee and is a previous member of Grievance Committee “17D.”


Marlon joined Armstrong Teasdale from Waldman Barnett in 2022. Prior to that, he served as a judicial law clerk to U.S. District Judge Jose E. Martinez and U.S. Magistrate Judge Barry S. Seltzer of the Southern District of Florida.

Marlon’s public service also includes five years as an Assistant Attorney General in the Criminal Appeals Division of the Office of the Florida Attorney General in Miami, where he authored more than 100 briefs in direct appeals and writ proceedings of all types.

Marlon’s appellate practice has resulted in a substantial number of published opinions on topics ranging from evidentiary admissibility and burdens of proof to federal jurisdiction and constitutional rights. He is equally comfortable in trial court and has co-chaired multiple trials to verdict.

Marlon began his career at well-regarded commercial litigation boutiques in South Florida.


  • Emory University School of Law  (J.D., honors, 2007)
  • University College London, University of London  (M.A., 2003)
    • Legal and Political Theory
  • University of Michigan  (B.A., 2002)


  • Florida

Professional Activities

  • Florida Bar (Appellate Rules Committee, 2018-2021; Grievance Committee “17D,” 2015-2018)
  • Emory University School of Law, Kessler-Eidson Trial Techniques Program (Adjunct Faculty, 2017-present)

Charitable and Civic Involvement

  • Broward County Consumer Protection Board (2018)


  • Spanish
Contact Us
  • Worldwide
  • Boston, MA
  • Chicago, IL
  • Denver, CO
  • Dublin, Ireland
  • Edwardsville, IL
  • Jefferson City, MO
  • Kansas City, MO
  • Las Vegas, NV
  • London, England
  • Miami, FL
  • New York, NY
  • Orange County, CA
  • Philadelphia, PA
  • Princeton, NJ
  • Salt Lake City, UT
  • St. Louis, MO
  • Washington, D.C.
  • Wilmington, DE
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Boston, MA
800 Boylston St.
30th Floor
Boston, MA 02199
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Boston, Massachusetts
Chicago, IL
100 North Riverside Plaza
Suite 1500
Chicago, IL 60606-1520
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Chicago, Illinois
Denver, CO
4643 S. Ulster St.
Suite 800
Denver, CO 80237
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Denver, Colorado
Dublin, Ireland
Fitzwilliam Hall, Fitzwilliam Place
Dublin 2, Ireland
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Edwardsville, IL
115 N. Second St.
Edwardsville, IL 62025
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Edwardsville, Illinois
Jefferson City, MO
101 E. High St.
First Floor
Jefferson City, MO 65101
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Jefferson City, Missouri
Kansas City, MO
2345 Grand Blvd.
Suite 1500
Kansas City, MO 64108
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Kansas City, Missouri
Las Vegas, NV
7160 Rafael Rivera Way
Suite 320
Las Vegas, NV 89113
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Las Vegas, Nevada
London, England
Royal College of Surgeons of England
38-43 Lincoln’s Inn Fields
London, WC2A 3PE
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Miami, FL
355 Alhambra Circle
Suite 1200
Coral Gables, FL 33134
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New York, NY
7 Times Square, 44th Floor
New York, NY 10036
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Orange County, CA
19800 MacArthur Boulevard
Suite 300
Irvine, CA 92612
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Philadelphia, PA
2005 Market Street
29th Floor, One Commerce Square
Philadelphia, PA 19103
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Philadelphia, Pennsylvania
Princeton, NJ
100 Overlook Center
Second Floor
Princeton, NJ 08540
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Princeton, New Jersey
Salt Lake City, UT
222 South Main St.
Suite 1830
Salt Lake City, UT 84101
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Salt Lake City, Utah
St. Louis, MO
7700 Forsyth Blvd.
Suite 1800
St. Louis, MO 63105
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St. Louis, Missouri
Washington, D.C.
1717 Pennsylvania Avenue NW
Suite 400
Washington, DC 20006
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Wilmington, DE
1007 North Market Street
Wilmington, DE 19801
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Wilmington, Delaware