Continuing Professional Education (CPE) is entering the third era in which education and learning occur in a workplace. The concept of learning in the profession is believed to lead on the improvement of job performance of public health professionals. However, little research has been done to understand the informal learning participation for professional development of public health professionals. All data were collected using online survey. The final sample used for analysis consisted of 172 public health professionals in the database of The Georgia of Public Health Training Center (GPHTC). The results from this study suggested that most public health professionals participated in available informal learning opportunities to advance in their professions.