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Danielle M. Diaz

Danielle M. Diaz focuses her practice on litigation involving contract disputes, administrative law, and commercial and regulatory claims against the federal government. She has broad experience in varying aspects of litigation, including fact and expert discovery, discovery motions, summary judgment motions and other pleadings, settlement discussions, mediation, binding arbitration, trial preparation, direct and cross-examination of fact witnesses, and appellate briefs. Danielle is also active in pro bono matters, and has represented an asylum seeker in removal proceedings in immigration court.



  • Williams v. Mosaic Fertilizer. Defended Mosaic in federal toxic tort litigation in which the plaintiff alleges that she suffered adverse health effects as a result of exposure to industrial emissions. The trial court entered summary judgment in Mosaic’s favor, and the plaintiff appealed to the U.S. Court of Appeals for the Eleventh Circuit. See Rhonda Williams v. Mosaic Fertilizer, LLC, Case No. 8:14-cv-1748, 2016 WL 7175657 (M.D. Fla. June 24, 2016). Plaintiff appealed the trial court’s decision and the Eleventh Circuit Court of Appeals affirmed entry of summary judgment in favor of Mosaic. Williams v. Mosaic Fertilizer, LLC, No. 17-10894, -- F.3d --, 2018 WL 2191426 (11th Cir. May 14, 2018).
  • Obtained $142 million damages award after trial for three nuclear utility companies in New England on breach of contract claim arising from U.S. DOE's failure to remove utilities' spent nuclear fuel to the Yucca Mountain, NV disposal site. Yankee Atomic Electric Co. v. US, 94 Fed. Cl. 678 (2010).
  • Represented plaintiffs in several other spent nuclear fuel cases, including one leading to $89 million award for a major West Coast utility. Pacific Gas and Electric Co. v. US., 92 Fed. Cl.175 (2010), aff’d, 668 F.3d 1346 (Fed. Cir. 2012). Assisted with settlement of that case, together with a related case seeking additional, subsequent-period damages of $204 million, for payment by U.S. of $266 million in 2012, plus periodic later payments of on-going damages.
  • Represented developer of prominent Florida coastal community in a takings case establishing a key precedent on the "parcel-as-a-whole" and Lucas/residual value issues. See Lost Tree Village Corp. v. US, 707 F.3d. 1286 (Fed. Cir. 2013), rev’g, 100 Fed. Cl. 412 (2011), on remand, 115 Fed. Cl. 219 (2014), aff’d, 787 Fed. 3d 1111 (Fed. Cir. 2015).
  • Legal Intern, Miami-Dade Office of the Public Defender, Juvenile Division, 2005

Recognition & Leadership

  • Listed, Super Lawyers magazine
    • Florida Super Lawyers, "Rising Star," 2019 
    • Washington, D.C. Super Lawyers, "Rising Star," 2014-2016
  • Member, Greater Tampa Chamber of Commerce, Women of Influence Committee
  • Member, Dawning Family Services, Board of Directors
  • Member, American Bar Association
  • Member, Hillsborough County Bar Association


  • J.D., magna cum laude, University of Miami School of Law, 2007
    • Order of the Coif
    • Managing Editor, University of Miami Law Review
    • Dean's Certificate of Achievement in Comparative Law
    • Writing Center Dean's Fellow
    • Intern, Children and Youth Law Clinic
  • B.A., cum laude, George Washington University, 2002
    • Vice-President, Omicron Delta Kappa
Con licencia para ejercer en
  • Florida
  • District of Columbia
  • U.S. Court of Appeals for the Ninth Circuit
  • U.S. Court of Federal Claims
  • U.S. District Court for the District of Columbia
  • U.S. District Court for the Middle District of Florida
  • U.S. District Court for the Southern District of Florida
  • U.S. Court of Appeals for the Eleventh Circuit