Prior to his selection as Executive Director, Mr. Johnson was a 17 year state prosecutor for the 15th Judicial Circuit in Palm Beach County. As an Assistant State Attorney Mr. Johnson has tried over 100 serious felony cases and in 2001 became Chief of the Felony Division. In 2005 Mr. Johnson took over the role of Chief Assistant State Attorney until 2009 when he became Senior Counsel for a newly established State Attorney Public Integrity Unit. Mr. Johnson has also served in various capacities as a member and chairman of the Florida Bar Grievance Committee 15E and the Unlicensed Practice of Law Committee as well as serving as a volunteer youth court judge. Since 2000, Mr. Johnson has been a frequent instructor for the Florida Prosecuting Attorneys Association in areas including ethics for prosecutors, victim rights, homicide prosecution, evidence and jury selection.

Mr. Johnson graduated from Columbia University in 1973 and obtained his law degree from Georgetown University Law Center in 1976.