Sudin, Managing Partner, received his under graduate majoring in accountancy from University of North Sumatera, Medan in 1973. Prior joining to Lauddin Sudin & Rekan, Sudin worked as an auditor at Badan Pengawasan. Keuangan dan Pembangunan. After retired  he joined and appointed as an audit partner at KAP Angiat Sitohang & Rekan (2003-2007), then he became managing partner at KAP Sudin Sitorus (2007-2009). Then he joined KAP Purbalauddin & Rekan as a partner on (2010). Since July 2011, he appointed as Managing Partner of KAP Lauddin Sudin & Rekan. During his professional career, Sudin has already experienced audited kinds of industries such as wood based & forestry, real estate & property management, steel construction, shipping, manufacturing and oil & gas. Being professional, Sudin always keeps his knowledge updated by attending seminars held by The Indonesian Institute of Accountants regularly. Sudin is a member of The Indonesian Institute of Accountants/IAI, Indonesian Institute of Certified Public Accountants/IAPI and Capital Market Supervisory Agency Forum/FAPM.