Andrianson graduated from the Faculty of Law, Atma Jaya Catholic University of Indonesia, Jakarta, with a cumlaude predicate in 3.5 years. He participated in the National and International Moot Court Competition, and also has a lot of experiences in mentoring students at Atma Jaya who participated in a law competition. Andrianson is an Associate at Guido Hidayanto & Partners. He is actively involved in a wide range of cases and projects particularly on general commercial disputes, construction and infrastructure disputes, banking and financial institutions disputes, commercial fraud, restructuring and bankruptcy industrial relation disputes, and compliance investigation actions.