Ashby Underhill

Ashby Underhill is an experienced trial attorney at Coquina Law Group P.A. in St. Augustine, Florida. He has tried over 30 jury trials and countless bench trials. Ashby is Board Certified in Aviation Law by the Florida Bar.   He focuses his practice on civil litigation,  aviation litigation, FAA defense and compliance, business/commercial litigation, personal injury defense, insurance defense, construction litigation, general civil litigation, real estate litigation, and professional liability defense. He is routinely in the courtroom and has successfully represented many clients in jury trials. Additionally, he has had cases successfully resolved through summary judgment motions and motions to dismiss for fraud upon the court. He is AV rated by Martindale-Hubbell and has been designated as a Super Lawyer Rising Star.

Prior to founding Coquina Law Group with Jeremiah Mulligan, Ashby was a lead trial attorney at an insurance defense firm.  While there, he tried many jury trials, which ranged from simple whiplash/neck injury cases to traumatic brain injury cases.  He has successfully represented insurance companies against coverage claims and bad faith claims.   He has obtained over  $250,000 in judgments for attorneys’ fees and costs against Plaintiffs after obtaining defense verdicts and/or low verdicts that triggered proposals for settlement.  Ashby was a prosecutor at the State Attorney’s Office of the Seventh Judicial Circuit of Florida, in St. Johns and Flagler County. He accumulated extensive trial experience and was awarded the 2013 Trial Top Gun for the Seventh Judicial Circuit State Attorney’s Office in 2013.

Ashby graduated Florida Coastal School of Law in Jacksonville, Florida in 2010. During law school he clerked for a construction law firm and was a Law Clerk for the Honorable Harmon Drew in the Louisiana Second Circuit Court of Appeals. Ashby was a legal intern and an associate at a general practice law firm in St. Augustine, Florida. There he handled a range of issues, but primarily handled business, construction and real estate litigation as well as contract drafting and negotiations.

Ashby was born and raised in Shreveport, Louisiana. He attended Northwestern 1001955_10102938648761172_5109903682224658409_nState University in Natchitoches Louisiana where he competed in College Rodeos and graduated with a B.S. in Business Administration. Ashby was raised in an aviation family which resulted in his passion for flying and aviation. He is a member of Aircraft Owners & Pilots Association, International Air & Transportation Safety Bar Association, and Lawyer Pilots Bar Association.




  • Florida Coastal School of Law, 2010
  • Northwestern State University of Louisiana, B.S. Business Administration, 2006

Professional Associations & Memberships

  • St. Johns County Bar Association
  • Volusia County Bar Association
  • Lawyer Pilots Bar Association
  • International Air & Transportation Safety Bar Association
  • Florida Bar Aviation Substantive Law Committee
  • St. Augustine Young Professionals Association
  • Aircraft Owners & Pilots Association
  • St. Augustine Rod & Gun Club

Court Admissions   

  • Florida Bar
  • United States District Court, Middle District of Florida
  • United States District Court, Southern District of Florida