Strategic Advocacy in Transportation, Technology & Regulatory Law
Sean Gellis has built a sophisticated practice focused on transportation, technology, procurement, and regulatory matters. A Board Certified specialist in State and Federal Government and Administrative Practice—a distinction held by less than 75 Florida attorneys—Mr. Gellis has established himself as a formidable advocate in complex litigation, administrative proceedings, and appeals.
As former FDOT General Counsel, and now unrestricted by post-employment limitations, Mr. Gellis offers clients unique insight into transportation and technology matters. His experience as Chief of Staff of the Department of Management Services—Florida’s central business and operations agency—provides additional strategic advantage in technology and procurement matters. This background enhances his ability to develop effective legal strategies, particularly in complex cases involving infrastructure development, technology initiatives, and regulatory compliance.
With over 100 successfully litigated cases and more than 20 appeals in state and federal courts, Mr. Gellis brings a proven track record of success to challenging legal matters. His litigation experience spans complex transportation disputes, technology procurement challenges, and high-stakes administrative proceedings. Whether defending against multi-million dollar enforcement actions or litigating precedent-setting cases, he combines aggressive advocacy with strategic thinking to achieve optimal results for his clients.
Through FloridaProcurements.com, Mr. Gellis regularly analyzes developments in transportation and technology procurement, maintaining current insight into industry trends and opportunities. As a Certified Information Privacy Professional (CIPP/US), he brings specialized expertise to technology matters, helping clients navigate complex privacy and data protection requirements. This breadth of experience allows him to address sophisticated legal challenges from multiple angles, finding innovative solutions where others might see only obstacles.
Mr. Gellis’s practice reflects his commitment to sophisticated advocacy and practical results. From guiding major infrastructure projects to resolving complex technology disputes, he has demonstrated an ability to navigate both legal complexities and business realities effectively. His AV Preeminent® Rating from Martindale-Hubbell reflects the highest level of professional excellence and ethical standards as recognized by his peers.
For representative examples of Mr. Gellis’s experience in transportation, technology, and procurement matters, please visit our Results page.
Professional Background:
- General Counsel, Florida Department of Transportation
- Chief of Staff, Florida Department of Management Services
- Deputy General Counsel, Florida Office of Insurance Regulation
- Assistant Attorney General, Florida Office of the Attorney General
- Board Certified in State and Federal Government and Administrative Practice
- Certified Information Privacy Professional (CIPP/US)
- AV Preeminent® Rating from Martindale-Hubbell (Highest Rating for Legal Ability & Ethical Standards)
- Inaugural Chairman of the Insurance Regulatory Practice Group (“IRPG”)
Education:
- Juris Doctor, St. Thomas University School of Law
- Bachelor of Arts in History, University of Florida
Courts Admitted:
- All County, Circuit, and Appellate Courts in Florida
- United States District Court – Southern District of Florida
- United States District Court – Middle District of Florida
- United States District Court – Northern District of Florida
Personal Info:
Outside the courtroom, Mr. Gellis is a devoted father to his son, who is currently discovering the world of kindergarten. He maintains an active lifestyle, training in Muay Thai and following combat sports. An avid reader and fitness enthusiast, he believes in the importance of continuous self-improvement both professionally and personally. His commitment to physical discipline through martial arts training reflects the same dedication he brings to his legal practice – focus, preparation, and strategic thinking.
Mr. Gellis brings this well-rounded approach to his legal practice, combining sophisticated advocacy with practical business solutions. His unique background allows him to navigate both legal complexities and regulatory challenges effectively, delivering results for clients when stakes are high.