Sahala Siahaan is a lawyer who has a lot of organizational experience. Sahala has served as the Chairman of the Central Executive Board of IPHI (Indonesian Legal Advisors Association), Honorary Member of ADHOC PERADI (Indonesian Advocates Association Code of Ethics), and also as the Chairman of KAI (Indonesian Lawyers Congress). Currently, this 1988 graduate of the Faculty of Law Universitas Trisakti is also elected as the Chairman of the Universitas Trisakti Faculty of Law Alumni Association until 2026.