This article aims to investigate the relationship between teacher years of experience and teacher certification training on teachers' TPACK (Technological, Pedagogical, Content, Knowledge) abilities. Online questionnaires were distributed to 500 high school teachers across disciplines using the TPACK questionnaire. Data was analyzed using descriptive statistical tests and Kruskal-Wallis. The findings show that teachers' TPACK abilities are good. There are differences in TK (Technological Knowledge), PK (Pedagogical Knowledge), TPK (Technological Pedagogical Knoowledge), TCK (Technological Content Knowledge), and TPACK abilities based on different teaching experiences and participation in teacher certification training. However, there was no significant difference in CK (Content Knowledge) ability between teachers’ years of experience and participation in the certification training program.