He is founder and Partner of JJS. He is a member of Indonesian Institute of Certified Public Accountants (IAPI), a member of Institute of Indonesia Chartered Accountants (IAI) and a member of Indonesian Tax Consultants Associations (IKPI). He has been certified with The Audit Board of Republic of Indonesia (BPK).

He has strong taxation and advisory background, with over 35 years of experience in taxation and advisory services, with abilities to effectively identify and resolve very complex taxation issues, understanding and competence in tax planning, tax reporting, refund claim, objection and tax appeal at Tax Court, internal control and business planning.