Wawan Djuwandi has extensive experience in mechanical maintenance and engineering, beginning with a position as Utility Plant Manager at PT. Kertas Kraft Aceh (Persero) from July 1986 to December 1999. Following this, Wawan held the role of Mechanical Senior Engineer at PT. Dian Swastatika Sentosa from January 2000 to April 2003, and then served as Mechanical Rotating Maintenance at PT. Power Gen Jawa Timur from April 2003 to January 2005. Since February 2005, Wawan has been working in Mechanical Maintenance at TPPI, accumulating nearly four decades of expertise in the field.