He began his career as a criminal advocate in Yogyakarta and Jakarta after graduating from the Faculty of Law at Widya Mataram University (UWM) and Universitas Borobudur (Unbor). As an advocate at FRP Lawfirm, his extensive trial experience has established him as a criminal law expert. Additionally, Saiful Salim specializes in state administration and Constitutional Court procedural law, notably involved in reviewing the Political Party Law regarding leadership term limits. He also served as legal counsel for legislative candidates in the 2019 elections. A former PERMAHI activist, he is a diligent professional who remains active in legal aid organizations, defending the rights of underprivileged clients.