Sienna Osta

Of Counsel

Professional Experience

Sienna Osta is an experienced civil litigator and focuses her practice on personal injury litigation including matters related to motor vehicle accidents, premises liability, negligent security, slip and fall, and medical malpractice cases. She has represented both plaintiffs and defendants in a number of jury trials and bench trials, throughout the state of Florida, placing her in an advantageous position to strategically navigate proceedings in the best interest of her clients.

Sienna takes pride in creating and maintaining individualized, personal relationships with each and every client through open and direct communication. She provides frequent updates at all stages of litigation, and is always responsive and available to her clients. Sienna approaches every case with the aggressive dedication it takes to gain the best possible outcome.

Areas of Expertise

  • Bodily Injury Defense
  • General Litigation
  • Insurance
  • Litigation
  • Negligent Security
  • Premises Liability
  • Tort Liability
  • Medical Malpractice, Criminal Defense


  • Thomas M. Cooley School of Law, J.D. (2015)
  • University of South Florida, B.S. (2012)

Bar Admissions

  • Florida
  • U.S. District Court for the Middle District of Florida
  • U.S. District Court for the Southern District of Florida

Office Location

  • Orlando, FL

Honors & Recognitions

  • Book Award: Appellate Advocacy, Negotiation Skills, and Research & Writing
  • Class Senator, Thomas M. Cooley Law School (2014)
  • Hillsborough County Bar Trial & Litigation Scholarship Recipient
  • International Legal Honor Society, Phi Delta Phi
  • Lawyers of Distinction Award Recognizing Excellence in Civil Litigation (2021)

Publications & Presentations

  • Published in Lawyer: The Importance of Jury Trials
  • Guest Speaker for Women's March and numerous organizations throughout the State of Florida

Professional & Community Involvement

  • American Bar Association, Member
  • Florida Bar Association
  • Creator of JUSTUS—Just Unapologetic, Shameless Transparency for a better US.
  • Drafter & advocate of Proposed Bill - A.M.P. Alerts, fighting for All Missing Persons, regardless of race, age, and national origin.
  • Guardian ad Litem
  • Public Speaker
  • Board Member - various organizations
  • Animal Rehabilitator