Sienna L.M. OstaCounsel

Primary Office

988 Woodcock Road
Suite 100
Orlando, FL 32803

Phone

689.208.0394

Professional Profile

Sienna L.M. Osta serves as counsel in Carr Allison’s Orlando (FL) office. Her practice focuses on the defense of premises liability and personal injury. She is admitted to practice in Florida and before the US District Court for the Middle and Southern Districts of Florida.

Sienna earned her Bachelor of Science in biomedical sciences with a minor in political science from the University of South Florida. She earned her Juris Doctor from Thomas M. Cooley Law School, where she served as class senator and received multiple awards, including the Book Award for appellate advocacy, negotiation skills and research and writing.

Sienna is a member of the Florida Bar Association, Florida Defense Lawyers Association (FLDA), the American Bar Association and the Orange County Bar Association. She also serves as Guardian ad Litem in the State of Florida and is a frequent speaker on topics such as domestic violence, legal reform and missing persons. Sienna has been a guest speaker for the Women’s March and numerous organizations throughout the state of Florida. She previously ran for the Florida State House and drafted proposed legislation addressing missing persons. She is also the creator of JUSTUS – Just Unapologetic, Shameless Transparency for a Better U.S. Her article, “The Importance of Jury Trials,” was published in Lawyer magazine.

Outside of her practice, Sienna enjoys mentoring law students, traveling, writing and spending time with her family.

Practice Areas

Admitted to Practice

Florida

US District Court, Middle and Southern Districts of Florida

Education

BS, University of South Florida

JD, Thomas M. Cooley Law School (FL)

Affiliations

Florida Bar Association

American Bar Association

Orange County Bar Association

Florida Defense Lawyers Association

News

Kirkpatrick, Oliver and Martin Named 2025 Mid-South Super Lawyers®

Carr Allison shareholders Donald B. Kirkpatrick, II, Thomas L. Oliver, II and Sean W. Martin have been named 2025 Mid-South Super Lawyers®. Attorneys are selected to be Super Lawyers® through a rigorous process of peer nominations, peer evaluations and third-party research. Congratulations!

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Hallford, Harlan, Miller, Norwood, Petherick, Van Camp, Hill, Swanson and Townsley Named as 2025 Mid-South Super Lawyers® Rising Stars

Carr Allison is proud to announce that attorneys Pamela Springrose Hallford, Nicole M. Harlan, Chancey R. Miller, Wade Norwood, Michael J. Petherick, Katie R. Van Camp, Tinsley Griffin Hill, Stephen A. Swanson and Alex Townsley have been selected as 2025 Mid-South Super Lawyers® Rising Stars. Rising Stars are selected through a rigorous process of peer nominations, peer evaluations and third-party research. Eligibility is limited […]

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Zwilling to Present Webinar on ETHICS: Ethical Considerations Concerning Artificial Intelligence in Legal, Employment and Insurance Relationships

At first glance, it may seem that a failure to embrace AI is unwise and shortsighted.  Upon closer examination, however, the myriad ethical issues involved establish just the opposite.  During this webinar, we will explore a multitude of ethical issues that should be considered in connection with the use of […]

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